Solar Street Lights Installed in Uganda
As we know, the wattages are the consumption of power, do not mean the brightness.
Brightness is related with lumen, more lumens means brighter. Lumen and wattage decide the luminous efficiency. Luminous efficiency is one of important factors when measure the lamp performance. The solar LED light has higher luminous efficiency can offer better brightness and consume less power. We can calculate the value by the below function.
Luminous Efficiency = Lumens / Wattages
GES upgraded the LED beads for all-in-one solar street lights that makes the luminous efficiency much higher than before.
We also customized new connected lens, which make the light distribution more uniform.
We did some contrast test with 4 type lamps: 70W old all-in-one solar street lights without lens, 70W new all-in-one solar street lights without lens, 70W old all-in-one solar street lights with lens, 70W new all-in-one solar street lights with lens.
Test method:
Hanging the light board in the standard position of the spectrum tester, testing the light board with the same power and recording the corresponding parameters for comparison.
Criterio: The luminous efficiency ratio of the new lamp board with lens is higher 15% than the ones of old type.
Below is the testing results:
| Model | Power of LED/W | Lumens/lm | Luminous Efficiency (lm/W) | Color Rendering Index (Ra) | Luminous Ratio | Luminous Efficiency Ratio |
|---|---|---|---|---|---|---|
| Old item without lens | 70W | 8338.9 | 119.1 | 76 | 121.04% | 121.57% |
| Updated item without lens | 69.69W | 10094 | 144.8 | 72.7 | ||
| Old item with lens | 70W | 7651.4 | 109.3 | 75.9 | 121.3% | 121.86% |
| Updated item with lens | 69.69W | 9281.7 | 133.2 | 73 |
According to the testing dada, for the new 70W lamps with connected lens, the lumen is about 9280 lm, and luminous efficiency is 133.2 lm/w, higher than the old one with 7651 lm, 109.3 lm/w.
There are a few factories still using the old type LED beads and separated lens. For the same wattage, their solar street lights have lower lumens (lower brightness).
Take 70W as an example, if their luminous efficiency is 109.3 lm/w, the total lumen is about 7651 (109.3*70=7651). It is even lower than our 60W with new lens and LED beads, which is about 7992 lumens (133.2*60=7992). It means our 60W is even brighter than their 70W, and our 60W lamps consume less power.
However, 130lm/w is just the beginning, our engneering team are still working on new technology. In the future, we may release new lamps with even higher luminous efficiency about 150~160 lm/w.
Please feel free to contact us if you have any questions or inquiries, we will try our best to support you.
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