I've "used up" a set of Nightbreaker Unlimiteds. Those I ordered from PowerBulbs.com . After 2 years (DRL equipped car), they started to get dimmer. Still brighter than the long life rated stock bulbs though. I'm interested in the Nightbreaker Silvers (think Osram Silverstars, the ones without blue tint), although I still have a set of unlimiteds and fogbreakers I ordered from China/aliexpress. They claim to be legit, with the asian distributor's hologram sticker and the unlimiteds are marked Germany. From my amateur hour testing methods using my cellphone's front facing camera as a lux meter, they came pretty close to the H9 bulbs w/o the increased wattage. I think they're worth it if you can find reliable lower cost sources. Powerbulbs.com often have 25% off sales and 20% off year round.