how do you measure lumens?

[Zander_The_RBP]

lol ok then how do u measure PAR?

Only way to know the exact number is to borrow(or buy but they usualy cost 200 bucks atleast) a PAR meter and test it out though that's usualy not nessicary it's far easier to compare it to a chart like the one on here in the planted section. This will give you a ballpark estimate of your PAR and tell you what types of corals you can have, etc

Usualy though it's far easier to say exactly what type of lighting you have(and how much) and ask what type of corals you can keep (in your tank at a certain depth). For example I don't need to know the PAR of a 150 watt metal halide to know that on a 30 gal it will grow just about every coral out there.

Try checking out the reef forum on here or on another website like reefcentral.

Good luck with your reef.

 

[The Real 118]

thanks

 

[The Real 118]

well i have 4-18W T5HO
2 10,000k
2 actinic
and 8 moon light leds on a ten gallon tank aka 16 inches off the sand what u think i can keep? i have filtering for a 30 gallon tank its overflow setup and i have a skimmer on the tank too and lots of current

 

[drewdog31]

With a Lumen meter of course