10 Qty. Halco F8 T5 Daylight ProLume F8T5DL 8w Linear Fluorescent Preheat Daylight Lamp Bulb 8 Watts - 6500K Color Temperature Bulb Base : G5 Bulb Shape : F4T5 Linear Fluorescent Average Life (Hours) : 6,000 Length (In.) : 12 - Tube Diameter (In.) : 0.63