Square Perfect 65 Watt Compact Fluorescent Full Spectrum Photo Bulb 4 Pack 65 Watt 5400K day light energy balance spiral energy saver light bulb Optimal color temperature makes this bulb perfect for photography These bulbs are highly rated and recommended by psychologists for SAD (Seasonal Affective Disorder) Approximate Incandescent Equivalent: 225 Watts 65 Watt Fluorescent Full Spectrum Bulb