Red hair sadly usually means electrolysis. I had mostly dark hairs, but also a few bronze patches, which were nightmare to remove. Laser didn't do anything for bronze hair until power could be set high enough, this was 9-10 sessions in. It burned the hair, but didn't do any harm to the follicle. Now at 13 sessions in, at max, it deals with bronze hair... blondish hair happily waits for electrolysis.