a few years back, i replaced all my 4 & 8 foot florescent fixtures with cheapo e-bag units.
what a HUGE difference ! brighter than daylight, and instant on in the dead of winter cold.
i think they were 5000k units, and i bought 12 pack multiples.
i installed them in the stripped florescent tins, and the light distribution is great !
i can actually see my mistakes before i make them now !