TriGlow (Case of 10) F32T8/SPX50 Linear Fluorescent 32-Watt T8 FO32 850 Light Bulb 48" 4' Straight T8 Fluorescent Tube Light Bulbs 32-Watt, 48", Medium Bi-Pin (G13) Base 5000K Natural White, 800 Series (850, SPX50) Average Lifetime: 30000 hours, Good Efficiency 75% less energy than incandescent Long Lasting Linear Fluorescent, Bulbs sleeved safe wile shipping