This really is an amazing bulb. The Jungle Dawn 40w Spot Mega Plant Grow Spotlight is designed to simulate visible sunlight and stimulate chloroplasts in plants in order to produce more energy for your plants to grow and thrive. This bulb is absolutely perfect for growing plants. The CRI (Color Rendering Index) is among the highest available in LED at 92+, and only uses 40 Watts but is as bright as a 300 Watt incandescent light bulb. This bulb also packs another punch: it has an internal miniature cooling fan. This bulb will work in any standard dome fixture, socket, drop light or clamp lamp. That being said, do not use this bulb in a double dome fixture in conjunction with any other bulb. The bulbs run the risk of becoming overheated. Do not set down flush against a glass top. This blocks air and prevents circulation. Features: approx. 3500 lumen 6.5K light color CRI 92+ Non-dimmable Can work on any timer 40w Bulb. Price is for one bulb.