Recessed Parabolic 2X4 For Three F32T8 Lamps, 120 Volt Electronic •Contains 3-F32T8 electronic ballast with 5 year warranty. •Deep cell parabolic louver reduces glare on computer monitors. •Silver parabolic louver with white steel body. •Also available in 277 volt. •Designed for lay-in grid ceiling. •23.75' wide, 47.75' long by 5.5' high.