Can anyone help me understand these readings... I borrowed my buddies lux meter to see if I can figure out why my coral keep bleaching. I have the setting at 50% blue and 40% white. Checking with the meter, I'm showing approximately 100 at the top, 250 towards the middle and 350-400 at the sand bed. Does this make sense? Every chart I've read shows the numbers getting small as you go further down in the tank; why would mine increase?