Had seen those awhile back, I've never really cared for it. You have to dim past 630w to run it, so it under powering it, and forbid the idea of a accidentally increase in power (750,1000, 1100).
Yeah i was intrigued by the DE Lec mainly because the cost of a solis tek ballast is so low. but honestly the more i play with the 315 the more i realize that it is capable on its own.
I think i would get better results with multiple 315's then with a lec 630 or a double ended lec.
I believe 3x 315 lecs will rock a 8x8 NO problem. and that's about as big as i would ever go.
my last harvest i pulled 1lb off 1x 315lec the most i ever pulled of of 1x 1000w hps was slightly over 1lb. running the same genetics.
The 1 pound harvest has been my goal with the lec. I just need to see if i can maintain it. I have been pushing the light to just under a 4x4 foot print with no real consequence.
Buds are still huge and seem to be tighter then they were under hps. One major difference maybe that with hps i grew 6 smaller plants at a time, and now with Lec i grow 4 larger plants.
I couldn't be happier with the results i have been getting with this light.