I have a 180 with a 3inch sand bed so like 2fft deep not sure . but i 3 175mh bulbs with a 180w pc's . i have no gsp's and last time i put a green cap and it just faded then died
ok so i got the bulbs yesterday from the ---- seller . they are awsome to tell u the truth . i thought i payed 48 for 1 but i got 2 . they are the 175mh bulbs . will buy again