Ge, f18dbx/835/eco4p, 18w, plug in 4 pin double biax replacement compact fluorescent bulb, g24q-2 base, nominal length = 5.8", 12,000 hour, 1200 lumens, 3500 kelvin color temperature, cri=82, minimum start temperature = 32°ree. Fahrenheit, tclp compliant, energy star rated.