An LED driver loses some power as heat. Its efficiency affects total system energy use and heat load. This chart compares driver types.
| Driver type | Typical efficiency |
|---|---|
| Linear (resistive) | 50 to 70% |
| Magnetic | 80 to 85% |
| Electronic constant-voltage | 85 to 90% |
| Electronic constant-current | 88 to 92% |
| High-end programmable | 90 to 94% |
Load it properly. Driver efficiency falls off below about 20% of rated load. Size the driver so the fixtures use most of its capacity.
See the LED Driver Calculator and 0-10V Dimming Guide.