Illustrative Performance Metrics and Test Results
Goal: To conduct field research and demonstrations involving off-grid LED systems.
- Granderson, J., J Galvin, D. Bolotov, R. Clear, A. Jacobson, and E. Mills. 2008. "Measured Off-Grid LED Lighting System Performance." Lumina Project Technical Report #4. [PDF]
| Performance Metric | Observed Min | Observed Max | Max/Min |
|---|---|---|---|
| Power (Watts) | 0.13 | 1.51 | 11.6 |
| Light output (lumens) | 3.3 | 38.1 | 11.5 |
| Luminous efficacy (lumens/watt) | 8.2 | 53.1 | 6.5 |
| Correlated color temperature (K) | 8,528 | 31,069 | 3.6 |
| Color rendering index | 80.2 | 91.0 | 1.1 |
| Maximum illuminance | 24 | 200 | 8.3 |
| Maximum beam candlepower | 7.6 | 244.0 | 32.1 |
| Luminance (cd/m2) | 12,399 | 758,712 | 61.2 |
| Daylight glare index (direct view) | 23 | 32 | 1.4 |
| Optical losses (%) | 7.6 | 24.0 | 3.2 |
