Headlight relays are nothing new- - - -Dad's shop was installing them on 6 volt vehicles in the early 1950's, and other drivers would flash their lights at cars with the relays installed, thinking the driver had failed to dim his lights. Running voltage all over the place before it gets to the headlights just naturally drops a lot of light output due to circuit resistance. Glad it's working for you!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!