I grow with Bml , fluence ,lumigrow, illumitex and in coco. Advanced is garbage.. Bridgelux and epistar led are not all that great
If the company is not running an osram, Cree or led made in house like illumitex f3 surexi then they are not worth the money. Spec king seems like good company I'm ordering their mother keeper it's on sale for 199.00.
The one I posted has a 5 year warranty. I know a small US company that is more expensive but has an 8 and they actually supply to Cree. I'm going to try to get a 'sample' out of them next week