This has come up a handful of times lately. I accidently brought it into another thread, and so as to not crap up that thread, I'm starting this one.
I am (and have been for quite some time) of the school of thought that says it's okay to run both beams of an H4 headlight at the same time. Plenty of other people are not. I'm not interested in discussing that here. I've done it to many headlights, and I know where I stand, despite some very persuasive and well-reasoned arguments to the contrary.
Still, I've never seen a single credible primary source (technical bulletin, spec sheet, manufacturer's statement, etc.) supporting either position. (I'm not counting statements that begin with, "I'm an engineer...", unless you're an EE who works for an automotive lighting company designing bulbs and/or lamps.)
Again, I don't want to open a general discussion on the matter, but if anyone can provide me said credible primary source- regardless of what position it favors- I'd be grateful (and will rep you, for the few points that's worth).
I am (and have been for quite some time) of the school of thought that says it's okay to run both beams of an H4 headlight at the same time. Plenty of other people are not. I'm not interested in discussing that here. I've done it to many headlights, and I know where I stand, despite some very persuasive and well-reasoned arguments to the contrary.
Still, I've never seen a single credible primary source (technical bulletin, spec sheet, manufacturer's statement, etc.) supporting either position. (I'm not counting statements that begin with, "I'm an engineer...", unless you're an EE who works for an automotive lighting company designing bulbs and/or lamps.)
Again, I don't want to open a general discussion on the matter, but if anyone can provide me said credible primary source- regardless of what position it favors- I'd be grateful (and will rep you, for the few points that's worth).