I bought a pair each of Sylvania EcoBright bulbs and Philips EcoVision, both 9003/HB2 size.
OEM bulbs: 51 (spec 55W)
Philips: 44W
Sylvania: 44W *
*Sylvania's bulbs start out at 48W and slowly drop to 44 after about a minute. The Philips bulbs start and stay at 44. It's possible the Sylvania's would drop even lower with more time but I stopped to not drain my battery.
Combined results (with
LED tail & marker lights), car on but not running.
| State | OEM power draw | Eco power draw |
| No lights | 38W | 38W |
| Running/marker + taillights | 66W | 41W |
| Headlights | 168W | 129W |
That's a 23% improvement.
I am currently running the Sylvania Ecobrights because of the dropping power consumption. They might (probably will?) settle at lower power than the Philips after a minute of warmup.
Brightness and color are the same with all 3 (oem, philips, sylvania) under the scientific test of "stand 50 feet away and look at them".