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cld-ds123 rev 1c cree ? xlamp ? cxb2540 led pro duc t d escrip tion the xlamp ? cxb2540 l e d array is a member of the second generation of the cxa family that delivers up to 30% higher effcacy and up to 20% higher lumens than the frst generation in the same l e s. the higher performance second generation cxa l e d arrays provide a drop-in performance upgrade to existing cxa l e d designs to shorten product development time. in addition, the cxb l e ds also allow lighting manufacturers to achieve the same or better performance with a smaller le s, enabling a smaller, more impactful luminaire. available in 2 - step, 3- step and 5-step e asywhite ? bins, the cxb12540 le d delivers high lumen output and high effcacy in a single, easy?to?use package that eliminates the need for refow soldering. the cx family l e d design guide provides basic information on the requirements to use the cxb2540 l ed successfully in luminaire designs. fe atures ? 19-mm optical source ? mechanical and optical design consistent with other cxa25 and cxb25 leds ? available in 70-, 80- and 90-minimum cri options ? cree easywhite ? 2-, 3- and 5-step binning ? forward voltage option: 36 -v class ? 85?c binning and characterization ? e xtremely uniform color over viewing angle ? top-side solder connections ? thermocouple attach point ? nema ssl ? 3 2011 standard fux bins ? rohs and re ach compliant ? ul ? recognized component (e349212) t able of cont e nts characteristics ............................................ 2 operating limits .......................................... 2 flux characteristics, easywhite ? order codes and bins ........................................... 3 relative spectral power distribution ......... 5 e lectrical characteristics ............................ 6 relative luminous flux ............................... 7 typical spatial distribution ......................... 8 performance groups - brightness ............. 8 performance groups - chromaticity .......... 9 crees easywhite ? bins plotted on the 1931 cie color space .............................. 10 bin and order code formats ................... 12 mechanical dimensions .......................... 12 thermal design ........................................ 13 notes ........................................................ 14 packaging ................................................. 15 product family data sheet copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. cree, inc. 4600 silicon drive durham, nc 27703 usa tel: +1.919.313.5300 www . cree . c om/x lamp
2 chara c teristics characteristics unit minimum t ypical maximum viewing angle (fwhm) degrees 115 e sd withstand voltage (hbm per mil-std-883d) v 8000 dc forward current ma 2100* reverse current ma 0.1 forward voltage (@ 1100?ma, t j = 85?c) v 34.8 38 * refer to the operating limits section. ope rating li m its the maximum current rating of the cxb2540 is dependent on the case temperature (tc) when the l e d has reached thermal equilibrium under steady-state operation. the graph shown below assumes that the system design employs good thermal management (thermal interface material and heat sink) and may vary when poor thermal management is employed. please refer to the mechanical dimensions section on page 12 for the location of the tc measurement point. cxb2540 0 300 600 900 1200 1500 1800 2100 2400 0 25 50 75 100 125 150 if (ma) case temperature ( c) copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
3 notes ? cree maintains a tolerance of 7% on fux and power measurements, 0.005 on chromaticity (ccx, ccy) measurements and a tolerance of 2 on cri measurements. see the measurements section (page 14). ? cree xlamp cxb2540 led order codes specify only a minimum fux bin and not a maximum. cree may ship reels in fux bins higher than the minimum specifed by the order code without advance notice. shipments will always adhere to the chromaticity bin restrictions specifed by the order code. * for 80 cri minimum l e ds, cri r9 minimum is 0 with a 2 tolerance. for 90 cri minimum leds, cri r9 typical is 60. ** flux values @ 25?c are calculated and for reference only. fl ux chara c teristic s, easywhite ? o rde r code s and bins ( i f = 1100? m a , t j = 85?c) the following table provides order codes for xlamp cxb2540 l e ds. for a complete description of the order code nomenclature, please see the bin and order code formats section (page 12). nominal cc t cri* minimum luminous flux 2-step 3-step 5-step min t yp g roup flux (lm) @ 85?c flux (lm) @ 25?c** g roup o rder code g roup o rder code g roup o rder code g roup o rder code 6500?k 70 --- w4 5225 5784 65e cxb2540-0000- 000n0bw465e x2 5590 6188 cxb2540-0000- 000n0bx265e 80 --- w4 5225 5784 65e cxb2540-0000- 000n0hw465e x2 5590 6188 cxb2540-0000- 000n0hx265 e 5700?k 70 --- w4 5225 5784 57e cxb2540-0000- 000n0bw457e x2 5590 6188 cxb2540-0000- 000n0bx257e 80 --- w4 5225 5784 57e cxb2540-0000- 000n0hw457e x2 5590 6188 cxb2540-0000- 000n0hx257 e 5000?k 70 --- w4 5225 5784 50e cxb2540-0000- 000n0bw450e x2 5590 6188 cxb2540-0000- 000n0bx250e 80 --- w4 5225 5784 50g cxb2540-0000- 000n0hw450g 50e cxb2540-0000- 000n0hw450e x2 5590 6188 cxb2540-0000- 000n0hx250g cxb2540-0000- 000n0hx250 e 90 92 v4 4545 5031 50g cxb2540-0000- 000n0uv450g w2 4860 5380 cxb2540-0000- 000n0uw250g 4000?k 70 --- w4 5225 5784 40e cxb2540-0000- 000n0bw440e x2 5590 6188 cxb2540-0000- 000n0bx240e 80 --- w2 4860 5380 40h cxb2540-0000- 000n0hw240h 40g cxb2540-0000- 000n0hw240g w4 5225 5784 cxb2540-0000- 000n0hw440h cxb2540-0000- 000n0hw440g 90 92 v2 4230 4683 40h cxb2540-0000- 000n0uv240h 40g cxb2540-0000- 000n0uv240g v4 4545 5031 cxb2540-0000- 000n0uv440h cxb2540-0000- 000n0uv440g copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
4 notes ? cree maintains a tolerance of 7% on fux and power measurements, 0.005 on chromaticity (ccx, ccy) measurements and a tolerance of 2 on cri measurements. see the measurements section (page 14). ? cree xlamp cxb2540 led order codes specify only a minimum fux bin and not a maximum. cree may ship reels in fux bins higher than the minimum specifed by the order code without advance notice. shipments will always adhere to the chromaticity bin restrictions specifed by the order code. * for 80 cri minimum l e ds, cri r9 minimum is 0 with a 2 tolerance. for 90 cri minimum leds, cri r9 typical is 60. ** flux values @ 25?c are calculated and for reference only. nominal cc t cri* minimum luminous flux 2-step 3-step 5-step min t yp g roup flux (lm) @ 85?c flux (lm) @ 25?c** g roup o rder code g roup o rder code g roup o rder code g roup o rder code 3500?k 80 --- w2 4860 5380 35h cxb2540-0000- 000n0hw235h 35g cxb2540-0000- 000n0hw235g w4 5225 5784 cxb2540-0000- 000n0hw435h cxb2540-0000- 000n0hw435g 90 92 v2 4230 4683 35h cxb2540-0000- 000n0uv235h 35g cxb2540-0000- 000n0uv235g v4 4545 5031 cxb2540-0000- 000n0uv435h cxb2540-0000- 000n0uv435g 3000?k 80 --- v4 4545 5031 30h cxb2540-0000- 000n0hv430h 30g cxb2540-0000- 000n0hv430g w2 4860 5380 cxb2540-0000- 000n0hw230h cxb2540-0000- 000n0hw230g 90 92 u4 3955 4378 30h cxb2540-0000- 000n0uu430h 30g cxb2540-0000- 000n0uu430g v2 4230 4683 cxb2540-0000- 000n0uv230h cxb2540-0000- 000n0uv230g 90 92 u2 3680 4074 30q 30u cxb2540-0000- 000n0uu230u u4 3955 4378 cxb2540-0000- 000n0uu430q cxb2540-0000- 000n0uu430u v2 4230 4683 cxb2540-0000- 000n0uv230q cxb2540-0000- 000n0uv230u 2700?k 80 --- v4 4545 5031 27h cxb2540-0000- 000n0hv427h 27g cxb2540-0000- 000n0hv427g w2 4860 5380 cxb2540-0000- 000n0hw227h cxb2540-0000- 000n0hw227g 90 92 u2 3680 4074 27h cxb2540-0000- 000n0uu227h 27g cxb2540-0000- 000n0uu227g u4 3955 4378 cxb2540-0000- 000n0uu427h cxb2540-0000- 000n0uu427g fl ux chara c teristic s, easywhite ? o rde r code s and bins ( i f = 1100? m a , t j = 85?c) - continued copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
5 rel ativ e spec tral po we r distrib ution the following graph is the result of a series of pulsed measurements at 1100?ma and t j = 85?c. relative spectral power distribution 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 380 430 480 530 580 630 680 730 780 relative spectral power wavelength (nm) 5000 k, 70 cri 4000 k, 70 cri 3000 k, 80 cri relative spectral power distribution 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 380 430 480 530 580 630 680 730 780 relative spectral power wavelength (nm) 30g, 3000 k, 90 cri 30q, 3000 k, 90 cri 30u, 3000 k, 90 cri copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
6 elec trical chara c teristics the following graph is the result of a series of steady-state measurements. 32 33 34 35 36 37 38 39 400 740 1080 1420 1760 2100 voltage (v) current (ma) tc = 25 c tc = 55 c tc = 85 c tc = 105 c copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
7 rel ativ e lu m inous fl ux the relative luminous fux values provided below are the ratio of measurements of the cxb2540 led at steady ? state operation at the given conditions, divided by the fux measured during binning, which is a pulsed measurement at 1100?ma at t j = 85?c. for example, at steady ? state operation of tc = 25?c, i f = 740?ma, the relative luminous fux ratio is 80% in the chart below. a cxb2540 led that measures 5225?lm during binning will deliver 4180?lm (5225 * 0.8) at steady ? state operation of tc = 25?c, i f = 740?ma. 0% 20% 40% 60% 80% 100% 120% 140% 160% 180% 400 740 1080 1420 1760 2100 relative luminous flux current (ma) tc = 25 c tc = 55 c tc = 85 c tc = 105 c copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
8 t ypical sp atia l distribution pe rform ance g roup s - brightne ss ( i f = 1100? m a , t j = 85?c) xlamp cxb2540 leds are tested for luminous fux and placed into one of the following bins. g roup code minimum luminous flux maximum luminous flux u2 3680 3955 u4 3955 4230 v2 4230 4545 v4 4545 4860 w2 4860 5225 w4 5225 5590 x2 5590 6010 x4 6010 6430 far field 0% 20% 40% 60% 80% 100% - 90 - 70 - 50 - 30 - 10 10 30 50 70 90 relative luminous intensity angle (o) copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
9 pe rform ance g roup s - chro m ati c ity ( t j = 85?c) xlamp cxb2540 leds are tested for chromaticity and placed into one of the regions defned by the following bounding coordinates. easywhite color t emperatures C 2- step code cc t x y 40h 4000?k 0.3777 0.3739 0.3797 0.3816 0.3861 0.3855 0.3838 0.3777 35h 3500?k 0.4022 0.3858 0.4053 0.3942 0.4125 0.3977 0.4091 0.3891 30h 3000?k 0.4287 0.3975 0.4328 0.4064 0.4390 0.4086 0.4347 0.3996 27h 2700?k 0.4524 0.4048 0.4574 0.4140 0.4633 0.4154 0.4581 0.4062 easywhite color t emperatures C 3- step ellipse bin code cc t center point major axis minor axis rotation a ngle () x y a b 50g 5000?k 0.3447 0.3553 0.00840 0.00312 65.0 40g 4000?k 0.3818 0.3797 0.00939 0.00402 53.7 35g 3500?k 0.4073 0.3917 0.00927 0.00414 54.0 30g 3000?k 0.4338 0.4030 0.00834 0.00408 53.2 30q 3000?k 0.4305 0.3935 0.00834 0.00408 53.2 30u 3000?k 0.4274 0.3837 0.00834 0.00408 53.2 27g 2700?k 0.4577 0.4099 0.00834 0.00420 48.5 easywhite color t emperatures C 5- step ellipse bin code cc t center point major axis minor axis rotation a ngle () x y a b 65e 6500?k 0.3123 0.3282 0.01110 0.00550 61.0 57e 5700?k 0.3287 0.3417 0.01230 0.00600 72.0 50e 5000?k 0.3447 0.3553 0.01400 0.00520 65.0 40e 4000?k 0.3818 0.3797 0.01565 0.00670 53.7 copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
10 cree s easywhit e ? bins p l ott ed on th e 1931 c i e co l or sp a ce ( t j = 85?c) 2700 k 3000 k 3500 k 4000 k 4500 k 5000 k 5700 k 6500 k 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39 0.40 0.41 0.42 0.43 0.44 0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39 0.40 0.41 0.42 0.43 0.44 0.45 0.46 0.47 0.48 ccy ccx ansi c78.377 quadrangle easywhite 5 - step easywhite 3 - step easywhite 2 - step copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
11 cree easywhit e ? bins p l ott ed on th e 1931 c i e co l or sp a ce ( t j = 85?c) - continued 2700 k 3000 k 3500 k 4000 k 4500 k 5000 k 30q 30u 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39 0.40 0.41 0.42 0.43 0.44 0.34 0.35 0.36 0.37 0.38 0.39 0.40 0.41 0.42 0.43 0.44 0.45 0.46 0.47 0.48 ccy ccx ansi c78.377 quadrangle 30q, 30u copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
12 bin an d o rde r code f orm ats bin codes and order codes are confgured as follows: o rder code bin code mec hanical dime nsions dimensions are in mm. tolerances unless otherwise specifed: .13 x 1 meaning of b2540n b2540n = 36-v cxb2540 ssssscc-hhhh-hhhggrnnnnn series = cxb2 5 internal code cri specificatio n b = 70 min cri h = 80 min cri u = 90 min cri kit code vf class n0 = 36-v class pe rformance clas s ssssscc-www -ff-ggr-aaaaa series = cxb2 5 chromaticity bi n vf class n0 = 36-v class internal code cri specificatio n b = 70 min cri h = 80 min cri u = 90 min cri flux bi n pe rformance clas s b2540n copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
13 therm al design the cxb family of l e d arrays can include over a hundred different le d die inside one package, and thus over a hundred different junction temperatures (t j ). cree has intentionally removed junction-temperature-based operating limits and replaced the commonplace maximum t j calculations with maximum ratings based on forward current (i f ) and case temperature (tc). no additional calculations are required to ensure the cxb led is being operated within its designed limits. please refer to page 2 for the operating limit specifcation. there is no need to calculate for t j inside the package, as the thermal management design process, specifcally from solder point (t sp ) to ambient (t a ), remains identical to any other l e d component. for more information on thermal management of cree xlamp le ds, please refer to the thermal management application note . for cxb soldering recommendations and more information on thermal interface materials (tim) and connection methods, please refer to the cree xlamp cx family l e ds soldering and handling document . the cx family l e d design guide provides basic information on the requirements to use cree xlamp cxb le ds successfully in luminaire designs. to keep the cxb2540 l e d at or below the maximum rated tc, the case to ambient temperature thermal resistance (r_c-a) must be at or below the maximum r_c-a value shown on the following graph, depending on the operating environment. the y - axis in the graph is a base 10 logarithmic scale. as the fgure at right shows, the r_c ? a value is the sum of the thermal resistance of the tim (r_tim) plus the thermal resistance of the heat sink (r_hs). r_j-c tc r_tim r_hs ta r_j-c tc r_c-a ta cxb2540 0.01 0.10 1.00 10.00 400 740 1080 1420 1760 2100 maximum r_c - a current (ma) ta = 25 c ta = 55 c ta = 85 c ta = 105 c copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
14 n otes measurements the luminous fux, radiant power, chromaticity and cri measurements in this document are binning specifcations only and solely represent product measurements as of the date of shipment. these measurements will change over time based on a number of factors that are not within crees control and are not intended or provided as operational specifcations for the products. calculated values are provided for informational purposes only and are not intended as specifcations. pre -release qualifcation t esting please read the le d reliability overview for details of the qualifcation process cree applies to ensure long? term reliability for xlamp leds and details of crees pre ? release qualifcation testing for xlamp leds. lumen maintenance cree now uses standardized ies lm ?80? 08 and tm?21? 11 methods for collecting long? term data and extrapolating led lumen maintenance. for information on the specifc lm ? 80 data sets available for this led, refer to the public lm-80 results document . please read the long-term lumen maintenance application note for more details on crees lumen maintenance testing and forecasting. please read the thermal management application note for details on how thermal design, ambient temperature, and drive current affect the le d junction temperature. rohs compliance the levels of rohs restricted materials in this product are below the maximum concentration values (also referred to as the threshold limits) permitted for such substances, or are used in an exempted application, in accordance with e u directive 2011/65/e c (rohs2), as implemented january 2, 2013. rohs declarations for this product can be obtained from your cree representative or from the product documentation sections of www.cree.com . rea ch compliance re ach substances of very high concern (sv hcs) information is available for this product. since the e uropean chemical agency ( e cha) has published notice of their intent to frequently revise the s v hc listing for the foreseeable future, please contact a cree representative to insure you get the most up-to-date r e ach declaration. re ach banned substance information (re ach article 67) is also available upon request. ul ? r ecognized component level 4 enclosure consideration. the led package or a portion thereof has been investigated as a fre and electrical enclosure per ansi/ ul 8750. vision a dvisory warning: do not look at an exposed lamp in operation. e ye injury can result. for more information about l e ds and eye safety, please refer to the led e ye safety application note . copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led
15 pa c kaging cree cxb2540 l e ds are packaged in trays of 20. five trays are sealed in an anti-static bag and placed inside a carton, for a total of 100 le ds per carton. e ach carton contains 100 le ds from the same performance bin. dimensions are in inches. tolerances: .13 x 1 size title of rev. sheet c drawing no. date date date check final protective finish material approved drawn by third angle projection .x 0.1 x 2 .xxx .010 .xx .03 .x .06 for sheet metal parts only .xx .05 .xxx .005 x 1 unless otherwise specified dimensions are in millimeters & before finish. tolerance unless specified: scale a b c d 1 2 3 4 5 6 6 5 4 3 2 1 a b c d phone (919) 361-4770 fax (919) 313-5303 4600 silicon drive durham, n.c 27703 unauthorized person without the written consent may not be copied, reproduced or disclosed to any confidential information of cree, inc. this plot contained within are the proprietary and cree confidential. this plot and the information of cree inc. notice 7.625 7.125 r .375 1.188 1.188 .38 1 / 1 0.500 a cxa25xx_datasheet_bag2013 cxa25xx_datasheet bag patent label is located on underside of cover label with cree bin code, quantity, lot # label with cree bin code, quantity, lot # label with cree bin code, quantity, lot # size title of rev. sheet c drawing no. date date date check final protective finish material approved drawn by third angle projection .x 0.1 x 2 .xxx .010 .xx .03 .x .06 for sheet metal parts only .xx .05 .xxx .005 x 1 unless otherwise specified dimensions are in millimeters & before finish. tolerance unless specified: scale a b c d 1 2 3 4 5 6 6 5 4 3 2 1 a b c d phone (919) 361-4770 fax (919) 313-5303 4600 silicon drive durham, n.c 27703 unauthorized person without the written consent may not be copied, reproduced or disclosed to any confidential information of cree, inc. this plot contained within are the proprietary and cree confidential. this plot and the information of cree inc. notice 7.625 7.125 r .375 1.188 1.188 .38 1 / 1 0.500 a cxa25xx_datasheet_bag2013 cxa25xx_datasheet bag patent label is located on underside of cover label with cree bin code, quantity, lot # label with cree bin code, quantity, lot # label with cree bin code, quantity, lot # patent label is located on underside of carton label with cree bin code, quantity, lot # size title of rev. sheet c drawing no. date date date check final protective finish material approved drawn by third angle projection .x 0.1 x 2 .xxx .010 .xx .03 .x .06 for sheet metal parts only .xx .05 .xxx .005 x 1 unless otherwise specified dimensions are in millimeters & before finish. tolerance unless specified: scale a b c d 1 2 3 4 5 6 6 5 4 3 2 1 a b c d phone (919) 361-4770 fax (919) 313-5303 4600 silicon drive durham, n.c 27703 unauthorized person without the written consent may not be copied, reproduced or disclosed to any confidential information of cree, inc. this plot contained within are the proprietary and cree confidential. this plot and the information of cree inc. notice 5.875 5.875 .38 r .375 .875 .875 1 / 1 0.500 a cxa15xx_datasheet_bag2013 cxa15xx_datasheet bag label with cree bin code, quantity, lot # label with cree bin code, quantity, lot # label with cree bin code, quantity, lot # patent label is located on underside of cover copyright ? 2015-2016 cree, inc. all rights reserved. the information in this document is subject to change without notice. cree ? , xlamp ? and easywhite ? are registered trademarks and the cree logo is a trademark of cree, inc. ul ? and the ur logo are registered trademarks of ul llc. xlamp ? cxb2540 led

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