as you go pass 6000k, it shows more color, but the lights are now producing more ultraviolet than actual usable light that could be see with the human eye. for example, 10k vs 6k the 6k will produce visibily more light

as for the lights, we are offering kits here at 260 all day with life time warranty for all colors, so 345 isn't a good deal

the brand i carry is apexcone and i can get 3000k up to 30000k

-thanks