yes in fact yesterday my buddy came over and we tested ....... the following was more or less close to directly under the light itself , 1 inch below the surface was 360 ish par 6 inches deep was 330ish at the bottom of my 130 max at sand lv 180 par as i moved off to the sides it droped to 230 at 6 inches below surface . i didnt do 1 inch at the edges as it would not matter , i was as low as 130par at sand lv in the far edges this is all at 50 percent with a 18k midmorning moving to 14k more or less high noon and back to a 18k mid/late afternoon . i am so very happy . now this is without the plastic splash guard and im sorry to say i didnt think to put it on to see if there was a change as we where in a hurry doing this on his lunch break from his store and i didnt wana be rude ....