it's finally hear first thought cant see!! too brite, that thing is waaaayyyyyyyyyyyy briter then the 90w. and the foot print is way bigger now my plants have all the room in the world. i spread all four of my 4ft girls way out so the don't touch and i still have plenty of foot print left. i have the light about 18inch's from the top of the canopy. hear are some pics of the 90w vs. 180w