MiracleLED 604829 Red/Blue Grow Lite, 10-Pack This grow light uses only 2 Watts of power but gives off the light and energy of a 50 Watt bulb. 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 NASA Developed Red and Blue Spectrum light for growing