There's alot of red in that panel, hence the stretch. Sorta what happens if you used HPS at that stage, plants "go to the light".

If you had a LED light that used mostly blue it would be a different story. But like I said earlier, cost wise I don't think it pays. One simple T5 either 6500K or like I promote super actinic white, so blue it looks like a blue neon tube compared to 6500k even.

Blue light stimulates the hormones that cause the plant to root.
Here's a couple of pics of my clonner/seedling light, the blue one is the actinic and usually run that one by itself for the first week or two.
oldmac Reviewed by oldmac on . LED growing trial As a relative noob to growing, I've been a little more willing to try different things than say an established grower that knows exactly how they like to do things. I've been having some significant heat problems in the basement, which blows my mind since ambient temp. down there is 68F and when I run a single 1000W HPS, it skyrockets to 80F. And that's with a 12000 BTU A/C!! So I'm giving the LED growing a shot. I figure it's worth the $1300 gamble, considering all the great things I've Rating: 5