Nominal Lumen Outputs
| Date | April 11, 2019 |
| Categories | Knowledge |
With lamp technology, it's importance to note a huge difference between the lamp output and the actual delivered lumens from the fitting, once the lamp is fitted. A traditional lamp will emit light is every direction, which increases the amount of light loss through the use of reflectors etc.
| Product | Initial Lumen Output | Delivered Lumens | Efficacy |
| 40W Incandescent | 450lm | 11lm/W | |
| 150W High Pressure Sodium | 15,000lm | ||
| 1,000W High Pressure Sodium | 110,000lm | ||
| 400W High Pressure Sodium | 50,000lm | ||
| 175W Metal Halide | 13,650lm | 7,500lm | 78lm/W |
| 250W Metal Halide | 19,500lm | 10,725lm | 78lm/W |
| 400W Metal Halide | 31,200lm | 17,160lm | 78lm/W |
| 1,000W Metal Halide | 78,000lm | 42,900lm | 78lm/W |
| 1,500W Metal Halide | 117,00lm | 64,350lm | |
| 1,500W Tungsten Halogen | 33,000lm | 22lm/W |
