MiracleLED 604835 4Watt Soft Daylight Grow LED Bulb, 3-Pack Ultra efficient bulb uses only 4 watts of power This NASA-designed light bulb is great for starting seedlings indoors during the winter months and for kitchen herb gardens This bulb gives off absolutely no heat so you can get the bulbs right on top of your plants Lasts up to 25 times longer than incandescent bulbs Cool operation - will not hurt plants even when touching