A website touting the Sylvania SilverStar headlight bulb says it provides ... and dual-filament (H7) bulbs from GE, Hella, Philips, and Sylvania, and PIAA's dual-filament bulb.
The 200 per cent-brighter Halfords Advanced bulb managed an improvement of 185 per cent in the FOM assessment over the ...
Having two compliant bulbs was an improvement over the H7 result, but there was still ... when testing H1 in its usual main light role. The headlight set – separate dipped and main lights ...
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