Propagation help

[BigWobb]

Have a growsaber 20w led 6500k above my propagation dome that constains my seedlings. I am wondering how far above them it should be

 

[Scientific]

20 watts on the label would mean about 10 watts actual output, and websites say only 1600 lumens, so you should be able to get it within inches of the plant, I would guess.

 

[AnimaSola]

Leds that are made for growing have high par at low wattage, I would keep it at least 6 or 8 inches above the seedlings.