I love these lights in my '72 and I had installed them before my relays - there was no flicker. I think the LEDs would draw less current than the original incandescents but I don't know for that to be a fact. I know after I installed the relay kit I did not notice them being any brighter - which actually is good since I am pretty sure if they were the road ahead of me would be scorched and I'd start wildfires LOL
Side note: I did have one of mine burn out but Dapper replaced it pretty fast and no trouble at all. So if you are wondering how they support their product after the sale, rest assure they do! All they wanted was a photo of the old lamp with the transformer cut off - they did not want the old lamp back.
PS: Luckily all my "helpers" have all grown up and don't want any part of working on my truck LOL
