IMHO, the H1s ST are NOT worth the money.
They are only rated for ONE HUNDRED HOURS.
That's right, 100 hours.
http://www.sylvaniaautocatalog.com/s...%20ST,%20%20ST
The week I purchased my Marauder, I replaced the 9007 and the H1
with SilverStars, and I like the way the 9007s are brighter.
After replacing the H1s at least 3 times in the first year, and 4 times last year,
I wrote to Sylvania to ask if I was doing something wrong.
When I found out they were rated only 100 hours, I told them
that I would no longer be buying SilverStar products.
I drive everywhere WITH MY LIGHTS ON.
Having a bulb that can't handle that, is not where I want to invest my money.
The sylvania OEM H1 is about $5 and lasts a whole year...
BTW, the 9007 is rated for only 150 hours in low beam, 90 hours in High Beam,
and I've been burning them for 2 years now.
I'm going to change them, only because they do get dimmer over time.
Pete...
2k04 BLACK Mercury Marauder 300A #810 of 3223
DOB 10/31/2003
DOP 1/2/2004
2k19 AGATE FORD Edge ST with Performance Brakes
DOB 12/11/2018
DOP 6/19/2019
Water Wetter, K&N AirCharger/Drycharger, SS Inserts,
SilverStar 9007SU, WeatherTech WeatherFlectors, Steering Wheel Badge,
AutoMeter Gauges (Oil Press, Voltmeter, and Trans Oil Temp),
ASC 840 VSS Sunroof, Kenwood KFC-C6879ie x4, COBRA Fender Badges,
Z&M Rear Control Arms, FORD GT Coil Covers,
Gorilla Lock Lugs all around, Decklid Designs Trunk Lid Liner,
SCT Xcalibrator2 (Innovative Interceptors) w/Lidio's (Alternative Automotive) Marauder 3.55 tuning,
4R75W by Fred Brown's Performance Transmission, tuned to match Lidio's tune,
DG Motorsports Carbon Fiber Radiator Cover, Zack's Badgeless Grille,
Accel 140034-8 Coil Packs, Granatelli Motorsports Coil-On-Plug wires
Even though I walk through the valley of the shadow of rice,
I will fear no turbo for displacement is with me.