BA, I just recently bought the following bulb to update my 1965 TR6SR with 12v system, still positive ground:https://www.lowbrowcustoms.com/coll...-unit-replaces-lucas-oem-446-414-370-312
It works, but I am not impressed. Just as happy with the old filament bulbs. The low beam is weak- it's dispersion in an original Lucas
reflector is not a good pattern. The high beam is great, that was an improvement on the filament type. The colour of the beam thrown out also takes a little getting used to- it is more of a blue/white versus a yellowish from a filament type. I am undecided on how the beam works in rainy weather, I have not noted any improvement over filament. Cannot comment on whether I am blinding oncoming traffic, but anyone with these Damn leds are constantly blinding me. My ammeter tells me the current draw is nice and low, roughly 1 amp movement versus 4 amp movement for a filament. Just a couple days after installing the bulb, my battery
was completely flat (NOT DUE TO BULB), and I had a nightime run home of 17 miles. I am running a stock charging and points ignition systems, the bike started roughly and the bulb did flicker using only alternator output. With battery
recharged from riding, no flicker evident.
Above usage was 17 miles per night, four to five nights a week, for maybe a month and a half as of this writing.
Notes on bulb construction- this particular bulb has leds on top and bottom. Low beam uses roughly 50% of leds, high beam uses 100% A poor design feature is that the sides of bulb do not have leds, this seems to make the low beam relatively ineffective.
Personal note on Led headlights- they should be illegal. Too much light for oncoming traffic in unlit rural areas, I have to pull over and come to a near stop every night because they are too dazzling, whereas I don't have to with older filament beam equipped vehicles using proper low beam for oncoming traffic.
So in a quick summary, the bulb sold by Lowbrow
is what I have based my writing on. I'll keep running it, but not impressed by any means.