Originally Posted by forzaazzurri
So there is a rule of thumb for Watts per gallon for fluorescent lighting.
What is the rule of thumb for LED
I can't get a straight (or even crooked) answer from anyone ????
There is no watt/gallon for LED
The few basic factors would be...
1)actual dimension of the tank vs the optic on the LED
This would tells you how high you need to place your light to cover the tank.
2) After you find out how high it will need to be placed, then check the PAR value of the light vs your live stock requirement. Usually soft coral need 50par LPS
need 150 and SPS
is 250 and up.
For example, if your light is 10" above water level and your tank is 24" deep, you want to keep SPS
on the sand bed. So what you need is look at the PAR reading for the fixture you want, if the PAR reading around 28" to 34" is around 200 to 250, u are good to go, if you have around 100PAR then it is not enough.
Plz understand PAR value is just like watt per gallon rule, it is not absolute, it is a rule of thumb type requirement. Coral can still grow less than that value just most people like to use that as guide line.