My question is what base lamp is Narva using for the Contrast +? Are they using the Range Power series?
If you could put a Kelvin rating on these lamps where would it be? Would these be considerer an 'all season' (goldish) lamp?
Thanks
By "base", do you really mean "on what BURNER is the Narva Contrast+ based on?"?
It see some models in the the H4 (P43t base) 9005 (P20d base) and 9006 (P22d base); I don't know what burners they use (probably just standard burners for the bulb type). Kelvin rating applies only to white light; the filtration may make this light non-white. The CCT of the light emitted from the filament itself, pre-filtration, should be the same as with any normal halogen bulb.
The H4 version only seems to have ECE R37 markings.
I think I've linked you this
post before.
It seems that Scheinwerfermann liked the quality overall, but the color made it a dealbreaker, as it's not selective yellow like in a real fog lamp, and not even consistent.