LimoStudio 10-Pack Compact 30 Watt 5400k Daylight Balanced Fluorescent Photography Light Bulb, Spiral Tube Design, AGG123 10 x LimoStudio Professional Quality 5400K 30 Watt Daylight Balanced Pure White Light Studio Bulbs 5400K Color Temperature Ideal For Photography Output Wattage Equivalent to 120 Watt Incandescent Light Bulb Up to 80% Energy Saving Compared to Incandescent Light Bulb 8000 Hours Long Life, Size: 3.5" diameter x 5.75" length