Hi CH, I found in previous vehicle (that used dipped beam as DRLs, 520d,) the Philips were burning out every six months.
Yer pays yer money, and takes yer choice!
This time I have gone for Ring xenon ultima 120% more light on the road (allegedly) for the dipped.
I was tempted to try PIAA but they whould have to be good for that price! http://www.fasteronline.co.uk/Piaa-piaa-xtreme-white-plus-twin-pack-p-5720.html
Use osram Night-Breaker Plus, last at least 18 months, pure white light, 50% more light.
HB3 Osram Night Breaker Plus +90% More Light
+90% Osram H7 Night Breaker Plus High Main Headlight
MTEC W21/5w T20 DUAL FILAMENT (SIDE/DRL) 7443 SUPER WHITE
All from eBay
How long do these last, had a pair of dearer white lamps from ebay and they died after two months, tried LED's and blew fuses as the lamps had a common connection which shorted out the power.
Would like to try LED's again but need to know if anyone has had any success with DUAL filiment LED lamps, that is two levels of brightness and two seperate circuits in the lamps??