Luminous efficiency and wavelength
The study enhances the understanding that the LED wavelength and LED the luminous efficiency is the only way to realize general lighting. We must start by recognizing that different wavelength has different luminous efficiency
we are to find some important data from LED factory
Incandescent lamp: 8-14lm/W
High pressure sodium lamp: 80-140 lm/W
Metal halide lamp: lm/W 60-90
Halogen tungsten lamp: lm/W 15-20
| Energy saving lamp: 80lm/w LED TYPE |
RA | Theoretical Light Effect | Actually Light Effec | Efficiency |
| Incandescent lamp | 0.98 | 140lm/W | 12-18lm/W | 8-12% |
| Fluorescent lamp | 0.9 | 257lm/W | 65lm/W | 25% |
| Metal halide lamp. | 0.9, | 260lm/W | 130lm/W | 50% |
| High power LED(white) | 0.98 | 280lm/W | 130lm/W | 46% |
| Low-pressure sodium lamp | 0.3 | 400lm/W | 200lm/W | 50% |