I bought a pair each of Sylvania EcoBright bulbs and Philips EcoVision, both 9003/HB2 size. Column1Column2BulbWatts (ea)OEM51 (spec 55W)Philips44Sylvania44 * *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 Column1Column2Column3Watts OEMWatts EcoNo lights3838Marker lights6641Headlights168129 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".