The following is a direct quote from the details on Amazon.
- THE MOST SIMILAR LIGHT TO SUNSHINE: this grow light simulates solar spectrum by increasing yellow and green lights, buy a sun indoor for your plants
green light is pretty inefficient, i wonder why theyre making this claim. yeah plants dont "see" it, or use it, they reflect it and its not "used" by chlorophyll, but photosynthesis yadda yadda yadda. for 70 bucks it seems like a sweet deal, for 300 watts, but keep in mind 150 w cfls, things like that. i just like to look at all angles before a purchase. if its one thing i can pass on to newer growers is buying smart!