Around 10 years ago I bought an A4 solid-state light box with a 5500°K illumination beneath a frosted plastic top. It has stood the test of time with no trouble at all.
It is a "VisualPlus" light box. Provides beautiful even light while studying trannies. Memory has it that it almost bankrupted me during my starting-out years in serious photography; it certainly cost more than $250. I'll never offload it; it was one of the very best purchases I made.