I did a 150W HPS vs a 119W beta light, and after about 3 weeks stopped the test, as the HPS wasn't performing well.

I am doing a second test now with a 126W against a 400W MH, and the MH is losing by quite a bit. Once I hit bloom, I'll be removing a plant from LED and placing it under MH, so we can have an equal bloom comparison, since the MH has fallen way short in veg.