LM-80 Test Report Approved Method: Measuring Lumen Maintenance of LED Light Sources Project Number: KILT1212-U00216 Date: September 17 th, 2013 Requested by: Dongbu LED Co., Ltd 90-1, Bongmyeong-Ri, Namsa-Myeon, Cheoin-Gu, Yongin-City, Gyeonggi-Do, Korea MODEL NAME: AT532LWPNE - Test Summary - Data Set Case Temp. (Ts) Ambient Temp. (Ta) Drive Current (If) Relative Humidity Average Lumen Maintenance at 6,000 hours Average Chromaticity Shift( u v ) at 6,000 hours 1 54.9 54.5 120mA 12.5% 100.5% 0.0022 2 84.7 84.4 120mA 9.2% 97.1% 0.0025 3 94.8 94.4 120mA 5.6% 85.4% 0.0068 September 17 th, 2013 KILT Page 1 of 11
1. Number of LED light sources tested - 25 Packages tested at actual case temperature 54.9-25 Packages tested at actual case temperature 84.7-25 Packages tested at actual case temperature 94.8 Samples have been selected to be representative of the overall population being tested. 2. Description of LED light sources - Dongbu LED Package: AT532LWPNE IF = 120 ma CCT(Nominal) = 5000 K - Package Dimension: 5.6 mm X 3.0 mm 3. Description of auxiliary equipment -Temperature controlling chamber for LED package/array/module This chamber consists of the water cooling heat-sink plates to control the case temperature of each device and the power supply required by LM-80 test conditions. - Photometric measurement tester for LED package/array/module This test equipment consists of the integrating sphere in conjunction with the temperature controlling plate and programmable current-source meter. 4. Operating Cycle LED packages are driven with a constant direct current. - Number of units: 25 at 55, 25 at 85 and 25 at 95 - Drive current: 120 ma - Typical Voltage: 3.2 V September 17 th, 2013 KILT Page 2 of 11
5. Ambient Conditions including airflow, temperature and relative humidity The minimal airflow is maintained in chamber. The ambient temperature around the LED packages inside chamber is controlled by air flowing and the thermocouple readings are monitored. - Case temperature: controlled to -2 - Surrounding air temperature: controlled to -5 - Relative humidity: <65 RH 6. Case Temperature(Test Point Temperature) LED temperature measurement point is shown in the picture below. Test Point 7. Drive Current of the LED light source during lifetime test See sub-clause 8.1, 8.2, and 8.3. 8. Lumen Maintenance data and Chromaticity shift reported over the measurement See each table. During the test of luminous flux and chromaticity, ambient temperature was set to 25 ±2. September 17 th, 2013 KILT Page 3 of 11
8.1. Temperature Data set 1: 55 - Drive Current :120mA - Measurement Current :120mA Φv VF Hour [lm] [V] Lumen Maintenance [%] 0 h (Initial) 0h 1000 h 2000 h 3000 h 4000 h 5000 h 6000 h 1 42.8 3.39 100.0 101.9 101.6 102.0 101.6 102.6 102.0 2 42.4 3.39 100.0 102.3 102.5 102.9 103.6 102.0 100.9 3 41.6 3.40 100.0 102.2 102.2 102.4 103.1 101.4 100.4 4 42.1 3.28 100.0 102.2 102.5 102.8 102.9 101.7 100.7 5 42.5 3.43 100.0 101.8 102.0 102.1 102.3 101.3 100.2 6 42.6 3.41 100.0 102.0 101.9 102.2 103.3 101.6 100.4 7 42.8 3.31 100.0 102.3 102.6 103.1 103.9 102.3 101.2 8 41.9 3.33 100.0 102.2 102.3 102.2 103.1 101.4 100.4 9 42.4 3.34 100.0 102.2 102.4 102.8 103.9 101.8 100.7 10 41.5 3.33 100.0 102.0 101.7 102.3 103.3 101.3 100.6 11 42.2 3.26 100.0 102.6 102.6 103.1 103.9 102.2 101.2 12 42.5 3.31 100.0 102.2 102.3 102.8 103.9 102.0 101.0 13 43.0 3.36 100.0 102.3 102.4 103.0 103.9 102.1 101.1 14 43.0 3.43 100.0 102.1 102.0 102.7 103.1 101.5 100.4 15 42.9 3.34 100.0 102.1 102.3 102.8 103.3 101.7 100.5 16 42.6 3.42 100.0 100.7 100.7 101.4 101.8 100.5 99.4 17 42.0 3.34 100.0 102.0 101.9 102.0 101.8 100.7 99.6 18 42.5 3.36 100.0 101.5 101.3 101.4 101.7 100.0 98.9 19 42.9 3.33 100.0 101.8 102.2 102.6 103.1 101.2 100.4 20 42.6 3.42 100.0 102.2 102.6 102.6 103.2 101.5 100.6 21 42.8 3.32 100.0 102.3 102.6 102.8 101.9 101.4 100.4 22 41.9 3.44 100.0 102.5 102.2 102.3 102.8 101.1 100.1 23 42.7 3.29 100.0 102.7 102.8 102.9 103.4 101.8 100.7 24 41.7 3.39 100.0 102.7 102.4 102.6 103.0 101.2 100.4 25 42.9 3.43 100.0 102.5 102.5 102.5 101.7 101.7 100.5 Ave. 42.4 3.36 100.0 102.1 102.2 102.5 102.9 101.5 100.5 Med. 42.5 3.36 100.0 102.2 102.3 102.6 103.1 101.5 100.5 σ 0.4 0.05 0.0 0.4 0.5 0.5 0.8 0.6 0.6 Min. 41.5 3.26 100.0 100.7 100.7 101.4 101.6 100.0 98.9 Max 43.0 3.44 100.0 102.7 102.8 103.1 103.9 102.6 102.0 September 17 th, 2013 KILT Page 4 of 11
Hour CCT Chromaticity Shift u v [K] 0h 1000 h 2000 h 3000 h 4000 h 5000 h 6000 h 1 5237 0.0000 0.0009 0.0006 0.0006 0.0009 0.0013 0.0021 2 5234 0.0000 0.0008 0.0006 0.0007 0.0009 0.0012 0.0022 3 5312 0.0000 0.0007 0.0006 0.0008 0.0010 0.0014 0.0023 4 5279 0.0000 0.0008 0.0007 0.0009 0.0008 0.0013 0.0023 5 5199 0.0000 0.0009 0.0006 0.0010 0.0008 0.0012 0.0020 6 5229 0.0000 0.0007 0.0005 0.0007 0.0008 0.0012 0.0021 7 5070 0.0000 0.0007 0.0006 0.0008 0.0008 0.0014 0.0022 8 5325 0.0000 0.0008 0.0005 0.0007 0.0009 0.0013 0.0022 9 5233 0.0000 0.0008 0.0006 0.0006 0.0008 0.0014 0.0022 10 5311 0.0000 0.0006 0.0004 0.0007 0.0007 0.0013 0.0022 11 5386 0.0000 0.0008 0.0006 0.0009 0.0007 0.0013 0.0020 12 5125 0.0000 0.0007 0.0005 0.0007 0.0007 0.0010 0.0017 13 5024 0.0000 0.0009 0.0006 0.0008 0.0009 0.0013 0.0019 14 5164 0.0000 0.0007 0.0008 0.0006 0.0010 0.0016 0.0025 15 5095 0.0000 0.0007 0.0006 0.0006 0.0008 0.0012 0.0022 16 5106 0.0000 0.0012 0.0010 0.0009 0.0013 0.0018 0.0026 17 5257 0.0000 0.0008 0.0006 0.0008 0.0011 0.0016 0.0025 18 5155 0.0000 0.0007 0.0007 0.0004 0.0010 0.0018 0.0026 19 5267 0.0000 0.0008 0.0006 0.0008 0.0009 0.0013 0.0022 20 5280 0.0000 0.0006 0.0005 0.0007 0.0008 0.0014 0.0022 21 5256 0.0000 0.0007 0.0005 0.0006 0.0010 0.0015 0.0024 22 5187 0.0000 0.0011 0.0009 0.0010 0.0012 0.0015 0.0024 23 5109 0.0000 0.0010 0.0009 0.0009 0.0011 0.0014 0.0022 24 5442 0.0000 0.0012 0.0010 0.0011 0.0013 0.0017 0.0026 25 5142 0.0000 0.0010 0.0008 0.0011 0.0011 0.0015 0.0023 Ave. 5217 0.0000 0.0008 0.0006 0.0008 0.0009 0.0014 0.0022 Med 5233 0.0000 0.0008 0.0006 0.0008 0.0009 0.0014 0.0022 σ 99 0.0000 0.0002 0.0002 0.0002 0.0002 0.0002 0.0002 Min. 5024 0.0000 0.0006 0.0004 0.0004 0.0007 0.0010 0.0017 Max 5442 0.0000 0.0012 0.0010 0.0011 0.0013 0.0018 0.0026 September 17 th, 2013 KILT Page 5 of 11
8.2. Temperature Data set 2: 85 - Drive Current :120mA - Measurement Current :120mA Φv VF Hour [lm] [V] Lumen Maintenance [%] 0 h (Initial) 0h 1000 h 2000 h 3000 h 4000 h 5000 h 6000 h 1 42.9 3.33 100.0 102.9 103.2 102.0 101.5 99.8 97.7 2 43.0 3.40 100.0 102.2 102.8 101.4 100.8 98.3 97.7 3 42.0 3.40 100.0 102.1 102.6 101.2 100.4 98.7 97.6 4 42.4 3.33 100.0 102.2 102.8 101.3 100.8 99.2 97.3 5 42.2 3.30 100.0 102.3 102.7 101.5 100.7 99.2 96.5 6 42.9 3.41 100.0 102.6 102.9 101.9 101.2 99.6 96.5 7 41.9 3.32 100.0 102.0 102.2 101.1 100.3 98.6 97.7 8 43.0 3.37 100.0 102.4 102.8 101.4 100.9 99.1 96.3 9 41.9 3.31 100.0 101.9 102.3 100.9 99.9 98.0 96.5 10 41.6 3.29 100.0 102.1 102.3 101.3 100.4 98.6 97.5 11 40.9 3.29 100.0 102.0 102.1 101.3 101.8 100.7 99.6 12 40.9 3.33 100.0 102.3 102.2 101.4 100.9 99.7 97.8 13 41.2 3.27 100.0 102.1 102.1 101.2 100.6 99.5 96.7 14 41.8 3.45 100.0 102.0 101.9 101.3 98.8 97.7 95.2 15 41.8 3.38 100.0 101.9 102.3 101.1 100.1 99.0 96.3 16 41.5 3.28 100.0 102.2 102.5 101.4 100.2 99.5 97.8 17 42.1 3.33 100.0 102.4 102.4 101.6 100.7 100.0 97.8 18 41.9 3.36 100.0 102.4 102.6 101.5 100.7 99.8 96.1 19 41.2 3.28 100.0 102.2 102.5 101.3 100.6 99.7 97.8 20 41.8 3.37 100.0 102.0 102.1 101.0 99.6 98.4 96.1 21 42.4 3.40 100.0 102.9 103.4 101.7 101.0 100.0 96.7 22 43.0 3.29 100.0 102.5 103.4 102.0 100.7 100.0 97.4 23 42.7 3.42 100.0 103.4 103.9 102.7 102.1 101.3 97.8 24 41.3 3.36 100.0 102.9 103.4 102.1 101.2 100.3 96.1 25 41.6 3.39 100.0 102.6 103.0 101.9 100.6 99.5 96.1 Ave. 42.0 3.35 100.0 102.3 102.7 101.5 100.7 99.4 97.1 Med. 41.9 3.33 100.0 102.2 102.6 101.4 100.7 99.5 97.3 σ 0.6 0.05 0.0 0.4 0.5 0.4 0.7 0.8 0.9 Min. 40.9 3.27 100.0 101.9 101.9 100.9 98.8 97.7 95.2 Max 43.0 3.45 100.0 103.4 103.9 102.7 102.1 101.3 99.6. September 17 th, 2013 KILT Page 6 of 11
Hour CCT Chromaticity Shift u v [K] 0h 1000 h 2000 h 3000 h 4000 h 5000 h 6000 h 1 5127 0.0000 0.0007 0.0008 0.0010 0.0013 0.0016 0.0026 2 5104 0.0000 0.0006 0.0006 0.0008 0.0011 0.0015 0.0025 3 5233 0.0000 0.0008 0.0008 0.0011 0.0012 0.0014 0.0024 4 4991 0.0000 0.0007 0.0007 0.0010 0.0009 0.0012 0.0017 5 5155 0.0000 0.0006 0.0007 0.0008 0.0009 0.0014 0.0023 6 5110 0.0000 0.0007 0.0007 0.0009 0.0009 0.0013 0.0022 7 5392 0.0000 0.0007 0.0007 0.0010 0.0012 0.0015 0.0026 8 5231 0.0000 0.0007 0.0007 0.0008 0.0010 0.0013 0.0021 9 5226 0.0000 0.0007 0.0006 0.0009 0.0012 0.0015 0.0029 10 5480 0.0000 0.0006 0.0006 0.0009 0.0009 0.0014 0.0029 11 5440 0.0000 0.0007 0.0006 0.0010 0.0012 0.0017 0.0028 12 5561 0.0000 0.0008 0.0008 0.0010 0.0013 0.0018 0.0020 13 5320 0.0000 0.0007 0.0007 0.0009 0.0016 0.0022 0.0025 14 5227 0.0000 0.0006 0.0006 0.0009 0.0014 0.0019 0.0018 15 5308 0.0000 0.0008 0.0008 0.0010 0.0007 0.0012 0.0025 16 5297 0.0000 0.0007 0.0007 0.0009 0.0009 0.0015 0.0023 17 5314 0.0000 0.0006 0.0006 0.0008 0.0010 0.0015 0.0025 18 5356 0.0000 0.0007 0.0006 0.0009 0.0009 0.0015 0.0025 19 5330 0.0000 0.0007 0.0007 0.0011 0.0010 0.0015 0.0025 20 5305 0.0000 0.0007 0.0007 0.0010 0.0012 0.0017 0.0029 21 5171 0.0000 0.0013 0.0013 0.0016 0.0016 0.0022 0.0033 22 5097 0.0000 0.0012 0.0013 0.0014 0.0014 0.0018 0.0029 23 5112 0.0000 0.0012 0.0013 0.0014 0.0014 0.0017 0.0025 24 5243 0.0000 0.0012 0.0014 0.0016 0.0015 0.0021 0.0029 25 5288 0.0000 0.0011 0.0010 0.0013 0.0013 0.0018 0.0025 Ave. 5257 0.0000 0.0008 0.0008 0.0011 0.0012 0.0016 0.0025 Med 5243 0.0000 0.0007 0.0007 0.0010 0.0012 0.0015 0.0025 σ 130 0.0000 0.0002 0.0003 0.0002 0.0002 0.0003 0.0004 Min. 4991 0.0000 0.0006 0.0006 0.0008 0.0007 0.0012 0.0017 Max 5561 0.0000 0.0013 0.0014 0.0016 0.0016 0.0022 0.0033 September 17 th, 2013 KILT Page 7 of 11
8.3. Temperature Data set 3: 95 - Drive Current :120mA - Measurement Current :120mA Φv VF Hour [lm] [V] Lumen Maintenance [%] 0 h (Initial) 0h 1000 h 2000 h 3000 h 4000 h 5000 h 6000 h 1 41.5 3.37 100.0 102.4 100.9 99.8 100.1 87.4 84.8 2 42.3 3.32 100.0 103.0 101.8 100.7 101.3 90.7 88.0 3 42.9 3.43 100.0 103.1 101.8 100.7 100.8 90.3 87.6 4 42.5 3.29 100.0 103.1 101.9 100.6 99.4 88.2 86.2 5 41.7 3.31 100.0 102.3 101.3 100.3 99.1 86.7 84.1 6 42.4 3.42 100.0 102.8 101.5 100.7 98.7 86.9 84.6 7 41.7 3.43 100.0 102.6 101.5 100.6 99.6 86.9 84.7 8 41.5 3.39 100.0 102.7 101.3 100.7 99.5 86.9 84.9 9 42.3 3.26 100.0 103.1 101.7 100.5 98.3 86.4 83.6 10 42.6 3.40 100.0 103.3 101.6 100.5 99.7 88.9 86.8 11 42.6 3.40 100.0 103.4 102.0 101.2 99.8 89.3 87.0 12 42.4 3.36 100.0 103.3 102.0 101.1 99.9 89.0 86.5 13 41.5 3.34 100.0 102.6 101.3 100.2 99.8 87.2 84.4 14 41.4 3.36 100.0 102.7 101.4 100.5 100.1 87.6 84.6 15 41.6 3.38 100.0 102.9 101.1 100.4 99.3 86.8 84.6 16 41.9 3.39 100.0 102.7 101.2 100.0 98.9 86.3 83.9 17 42.5 3.31 100.0 103.3 102.1 100.9 99.2 87.8 85.0 18 41.3 3.26 100.0 102.5 100.9 100.0 99.4 86.7 84.6 19 42.1 3.44 100.0 102.7 101.4 100.2 98.0 85.7 83.5 20 43.4 3.33 100.0 103.1 102.0 100.8 99.4 90.0 87.3 21 41.3 3.38 100.0 102.8 101.5 100.2 100.9 88.8 86.2 22 41.4 3.26 100.0 103.3 102.4 101.0 99.8 86.9 85.0 23 42.9 3.33 100.0 103.5 102.7 101.2 100.3 90.1 87.4 24 42.8 3.27 100.0 103.2 102.1 100.5 99.5 88.6 85.6 25 42.1 3.38 100.0 102.3 101.3 99.8 99.6 88.0 85.1 Ave. 42.1 3.35 100.0 102.9 101.6 100.5 99.6 87.9 85.4 Med. 42.1 3.36 100.0 102.9 101.5 100.5 99.6 87.6 85.0 σ 0.6 0.06 0.0 0.4 0.4 0.4 0.7 1.4 1.3 Min. 41.3 3.26 100.0 102.3 100.9 99.8 98.0 85.7 83.5 Max 43.4 3.44 100.0 103.5 102.7 101.2 101.3 90.7 88.0 September 17 th, 2013 KILT Page 8 of 11
Hour CCT Chromaticity Shift u v [K] 0h 1000 h 2000 h 3000 h 4000 h 5000 h 6000 h 1 5217 0.0000 0.0007 0.0008 0.0008 0.0011 0.0065 0.0074 2 5259 0.0000 0.0008 0.0006 0.0008 0.0012 0.0060 0.0075 3 5273 0.0000 0.0005 0.0005 0.0007 0.0006 0.0062 0.0075 4 5194 0.0000 0.0006 0.0007 0.0008 0.0009 0.0064 0.0069 5 5095 0.0000 0.0007 0.0007 0.0009 0.0012 0.0067 0.0078 6 5073 0.0000 0.0007 0.0006 0.0006 0.0009 0.0061 0.0069 7 5200 0.0000 0.0007 0.0008 0.0009 0.0012 0.0059 0.0063 8 5196 0.0000 0.0008 0.0004 0.0008 0.0009 0.0061 0.0067 9 5252 0.0000 0.0008 0.0008 0.0007 0.0010 0.0054 0.0068 10 5083 0.0000 0.0007 0.0007 0.0008 0.0008 0.0065 0.0070 11 5041 0.0000 0.0006 0.0006 0.0007 0.0010 0.0059 0.0063 12 5195 0.0000 0.0006 0.0006 0.0006 0.0008 0.0063 0.0066 13 5204 0.0000 0.0008 0.0008 0.0007 0.0009 0.0060 0.0067 14 5297 0.0000 0.0008 0.0008 0.0008 0.0009 0.0060 0.0068 15 5416 0.0000 0.0008 0.0008 0.0008 0.0012 0.0061 0.0067 16 5343 0.0000 0.0007 0.0007 0.0007 0.0009 0.0061 0.0068 17 5255 0.0000 0.0008 0.0008 0.0007 0.0011 0.0058 0.0073 18 5250 0.0000 0.0007 0.0007 0.0008 0.0010 0.0066 0.0070 19 5271 0.0000 0.0008 0.0008 0.0009 0.0012 0.0056 0.0062 20 4977 0.0000 0.0007 0.0007 0.0006 0.0008 0.0061 0.0066 21 5269 0.0000 0.0007 0.0007 0.0008 0.0011 0.0060 0.0064 22 5374 0.0000 0.0013 0.0013 0.0013 0.0011 0.0057 0.0071 23 5032 0.0000 0.0013 0.0013 0.0014 0.0018 0.0050 0.0070 24 5060 0.0000 0.0013 0.0013 0.0012 0.0015 0.0057 0.0060 25 5231 0.0000 0.0013 0.0013 0.0013 0.0019 0.0056 0.0064 Ave. 5202 0.0000 0.0008 0.0008 0.0008 0.0011 0.0060 0.0068 Med 5217 0.0000 0.0007 0.0007 0.0008 0.0010 0.0060 0.0068 σ 109 0.0000 0.0002 0.0003 0.0002 0.0003 0.0004 0.0004 Min. 4977 0.0000 0.0005 0.0004 0.0006 0.0006 0.0050 0.0060 Max 5416 0.0000 0.0013 0.0013 0.0014 0.0019 0.0067 0.0078 September 17 th, 2013 KILT Page 9 of 11
9. TM-21-11 Report : Projecting Long Term Lumen Maintenance of LED Light Source - Calculator results have been validated by NIST Table 1: Report at each LM-80 Test Condition Description of LED Light - Manufacturer : Dongbu LED Co., Ltd Source Tested (manufacturer, model, - Model : AT532LWPNE catalog number) Test Condition 1-54.9⁰C Case Temp Test Condition 2 84.7⁰C Case Temp Test Condition 3 94.8⁰C Case Temp Sample size 25 Sample size 25 Sample size 25 Number of failures 0 Number of failures 0 Number of failures 0 DUT drive current used in the test (ma) Test duration Test duration used for projection (hour to hour) Tested case temperature (⁰C) 120 DUT drive current used in the test (ma) 120 DUT drive current used in the test (ma) 6,000 Test duration 6,000 Test duration 6,000 1,000-6,000 54.9 Test duration used for projection (hour to hour) Tested case temperature (⁰C) 1,000-6,000 84.7 Test duration used for projection (hour to hour) Tested case temperature (⁰C) 120 1,000-6,000 α 2.734E-06 α 1.048E-05 α 3.930E-05 B 1.029 B 1.044 B 1.102 Calculated L70(0k) Reported L70(0k) 141,000 >36000 Calculated L70(0k) Reported L70(0k) 38,000 >36000 Calculated L70(0k) Reported L70(0k) 94.8 12,000 12,000 10. Observation of Failures No optical, electrical or mechanical failure of any LED Package was seen during the lifetime testing. 11. LED Light source monitoring interval Measurements have been taken after the following durations: Tc = 54.9 0, 1000, 2000, 3000, 4000, 5000 and 6000 hours Tc = 84.7 0, 1000, 2000, 3000, 4000, 5000 and 6000 hours Tc = 94.8 0, 1000, 2000, 3000, 4000, 5000 and 6000 hours September 17 th, 2013 KILT Page 10 of 11
12. Photometric Measurement Uncertainty The testers are calibrated monthly and the calibration data ensures ±2% uncertainty of measurement. Prepared By: Reviewed By: Jungsu Kim Principal Engineer SangkyooJeon Technical Manager September 17 th, 2013 KILT Page 11 of 11