I have been using a LED for several months now and IT ROCKS ! Veg growth has been excellent and it is flowering like crazy now! Although this is my second indoor grow, I have had a friend remark that my growth has been really good and he is impressed. He said he is going to go LED when the prices go down a little.
I have a small grow area (4x2x5) so I elected to go LED as I heard the results were good and cooler lights are a big plus. The cost was about $120 more than HPS for me. I do have to admit though, that I have spent a lot of time researching and on line. That probably made my grow a little better.
The LED is 432 watt and does not heat up the tent too much. I use a in line fan and keep temps about 78 - 80 in day. I have heard that LED makes the cola’s very hard and dense.
The buds are really growing fast now and look great. I did grow outside many years ago but can not remember buds developing this fast. Of course, the strains are likely better now and the nutes are more specialized. Robert has some excellent genetics from my results so far.
That is my 2 cents on LED. It performs good for me.