Can't help you as I also cant find 42w in 6500k. Superstore had 42w ones not sure of spectrum but it stated not to be used upside down, they were like 13 bucks a piece.
Pasofol Reviewed by Pasofol on . HELP Can't find 42W 6500K CFL's anywhere Where in Canada does one find CFL's in that spectrum and size? Any help would be appreciated. Rating: 5