UP TO 150LM/W LUMINOUS EFFICIENCY LED TUBE.
What? We heard about this kind of item years ago. But most of them were just nominal parameter. Or it’s a keyword only for attracting customers. The real data of luminous efficiency could not reach 150lm/W. Or something like offering 150lm/W from LED Chips.
Recently, our lab (FCS, 3rd party testing & inspection for LED items) received some sample of LED T8 Tube and there is more than 150lm/W as luminous efficiency.
Here let’s check these samples.
Sample: LED T8 Tube
Rated Power: 10W
Nominal Luminous Efficiency: 150lm/W
Supplier: one manufacturer from Shenzhen, China
On the housing, this tube is similar to common LED T8 tube with a plastic made reflector.
Plastic reflector with marbling. There’s nanomaterial as per manufacturer’s information.
▲Nanotube (reflector) thickness: 0.7mm
▲LED PCB’s installation
LED item burn-in for 2hours @26.0°C
Left Point: 38.5°C Right Point: 39.0°C
4. Driver Performance
Input Voltage: 220Vac
Power Factor: 0.95
Driver Efficiency: 93.2%
Now let’s check if there is more than 150lm/W luminous efficiency as per supplier mentioned or not.
152lm/W luminous efficiency for complete lamp, we also measure the luminous efficiency for LED PCB itself, It’s 161lm/W. Means the transmittance of the reflector is up to 94%.
If people can watch the LED chips by eyes from such high transmittance housing of LED tube?
No. We cannot see the LED chips from the reflector.
The LED T8 Tube we evaluate this week with 1500lm luminous flux but only in 10W as the power. Suitable for replacing the common LED T8 Tube, which its power is 16-18W with 1600lm luminous flux.
In the near future, the LED item’s lumen will become higher but the power will be lower. Factories are devoting to increase the luminous efficiency. As the same time, the color rendering index will be improved as well as the uniformity of CCT.