We are pleased to be the premier photographic supplier of Square Perfect products. We have combed the world over for the most robust, highest quality, full featured photo products available. These bulbs are no exception.WHAT IS INCLUDED?Pack of Four (4) Bulbs65 Watt 5500K day light energy balance spiral energy saver light bulbOptimal color temperature makes this bulb perfect for photographyThese bulbs are highly rated and recommended by psychologists for SAD (Seasonal Affective DisorderApproximate Incandescent Equivalent: 300 Watts