Ok I borrowed a par reader from a friend. Comparing between T5 and LED. At full blast on both channels, 24" tall tank straight down, 1/4 down from surface where the first coral - 305, on sand 105. My 16" tall breeder with 4 x 39 watt T5 - first coral on top - 176, sand 98. And to my astonishment, my 40 gal breeder tank looks much brighter than my 3 ft x 2ft x 2ft tall tank under this LED. Looks like through naked eye this LED put out more intensity than i can see.
|