Espen LED channel Retrofit Kit, Input 120-277Vac, 4ft, CRI > 80, 3500K/4000K/5000K field-adjustable, 38W/46W/54W filed-adjustable, 5200lm/6150lm/7050lm, 0-10V dimmable, frosted lens, Retrofit 8ft strip fixture. Standard Warranty