I own an Advanced Platinum P150 (150w) and I can say I was afraid because one reads a lot of reviews from people who don't own one, so you don't know how bad it can be and that it sometimes makes you doubt.
When I purchased it, I simply went by a recommendation from a friend, the 5 year warranty convinced me, later I read all sort of reviews and had to spend a couple of weeks reading about PAR, wavelengths, etc. After that, I was still in doubt. After my research I think it does equals to an 250HPS in PAR and in theory, but I have no results to compare to.
I have never grown with HPS, only with CFL and Outdoors. This is my first crop with this LED and I'm not scared anymore. This last harvest is the 5th AK47 I grow from the same package, and the yield seems to be equal to previous harvests of its siblings.
A WW I have on the same tent is enormous, way bigger than with CFL and using a smaller pot than the one I used with CFL and outdoors, leaves are dark green, bunch of colas and starting to make buds. I'm optimistic on it. It resembles a fem ( not auto ) WW I had outdoors in size, but this one looks more promising in terms of speed and number of pistils, smell is also way sweeter and stronger than before, using the same nutes, not sure if that has to do with the lights or not.
Area is 20x36" or 1.6x3' - Check out my journal below for specifics and pictures.