1. Luminaire efficacy = (lumen/watt)

2. Lumen maintenance (L70)

The lumen output of LED luminaire shall deliver at least 70% of its initial lumen after operating 35,000 hours and 25,000 hours for LED luminaire and self-ballasted LED lamp respectively. For compliance with the L70 threshold lumen maintenance requirements, the lumen maintenance data of each colour temperature LED luminaire using 6000 hours is acceptable for projecting the L70. The required lumen maintenance at 6,000 hours shall not be less than 94.1% and 91.8% for L70 = 35,000 hours and L70 = 25,000 hours respectively.

 

3. Colour Rendering Index (CRI):

CRI shall be minimum 75 for colour temperature from 2700-6000K for indoor luminaires and minimum 80 for self-ballasted LED lamp.

 

4. Power factor:

The power factor of the LED luminaire circuit and self-ballasted LED lamp shall be minimum 0.9 and minimum 0.6 respectively.

 

5. Correlated Color Temperature (CCT) and its tolerance limit:

The colour temperature of a group of LED luminaires in the same space or room shall not be visually noticeable. The nominal CCT of the LED light source shall preferably be one of the following values. The tolerance limits shall be within the below ranges:

2700K      2725±145K

3000K      3045±175K

3500K      3465±245K

4000K      3985±275K

5700K      5665±355K

6500K      6530±510K

 

1.发光效率=（流明/瓦特）

2.流明维持率（L70）

LED灯具和自镇流LED灯分别工作35,000小时和25,000小时后，LED灯具的流明输出应至少提供其初始流明的70％。为了符合L70阈值流明维持要求，投影L70可接受每个色温LED灯具使用6000小时的流明维持数据。对于L70 = 35,000小时和L70 = 25,000小时，要求的6,000小时流明维持率分别应不低于94.1％和91.8％。

 

3.显色指数（CRI）：

对于2700-6000K室内照明色温，CRI最低应为75；对于自镇流LED灯，CRI最低应为80。

 

4.功率因数：

LED照明电路和自镇流LED灯的功率因数分别应至少为0.9和最小0.6。

 

5.相关色温（CCT）及其容限：

同一空间或房间内的一组LED灯具的色温在视觉上不应明显。 LED光源的标称CCT应优选为以下值之一。公差极限应在以下范围内：

2700K 2725±145K

3000K 3045±175K

3500K 3465±245K

4000K 3985±275K

5700K 5665±355K

6500K 6530±510K