12V DC CFL bulb. Rated at 25 watts.Fits in any standard light socket, so it's very easy to convert your favorite lamp to 12 Volt DC for solar energy systems. Bulb measures 5" long (not including the threaded metal part) and 2.25" diameter at its widest.Color temp. is 6400K. Rated at 1400 lumens. 12V DC 1.6 Amps.