Miracle LED Almost Free Energy 100W Growth Starter Blue LED Grow Lite - Blue Light for Seed Starting and Strong Plant Stems in DIY Horticulture, Hydroponics, and Indoor Gardens (604291) Single Pack. Features : AFE (Almost Free Energy) certified for garden centers and greenhouses - buy what the pros use!. The blue light spectrum is designed to promote early stage plant growth. This bulb emits 475Nm light direct from the LEDs. 9W LED replacing 100W flood, massive energy savings!. 1900 micromoles of growing power means more energy for your plants. Runs for $1.08 per year with virtually no heat signature!