Hey, a question for one of lecky types, I got a Stedi 7" LED from Repco for my 2016 softail slim, my headlight was crap, low beam wasn't worth a c##t full of cold water and they had these in stock for $200, gave me a discount and I paid $182 so that was cool. 

Asked on HTT, and this is how it's done, diodes would work but a relay is even easier it would seem.

Haha, freehand ain't real steady

Been for a couple of night jaunts to suss out the light and have come to the conclusion that there is going to be no noticeable difference in light output having low beam on with high, the way the light is set up with the fillers takes care of it, and, when you tip it into corners a focused patch of light fills the lean dead spot, again it's the way it's set up, not extra bulbs lighting up, if it lasts a couple years I'm thinking it's a bargain good light, nothing in the literature says anything about how they have done what, bugs were atrocious but got a couple of pics sitting still.

Update on this Stedi light, can no longer recommend them for a Harley, the vibration has shaken the park light loose in the the housing, being sealed there is no way to resecure it, still works but not what you want in a headlight.

I fitted the H4 Stedi. Dam thing was made for the USA hi went to the left.

I got mine from Repco Hogey, ADR light but the bloody park light but has come loose, still works but for how long who knows.

Thanks for putting that link up Soap, I've had no luck with all the LED ones I've tried, Harley and aftermarket, think I'll go back to good globes and semi sealed lenses, something like these....