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A lux meter is the cheapest way to know. $15, delivered. Search for "lx1010b" - it's the standard model.
20,000 lux is "low light"; 100,000 lux is direct sunlight at sea level.
Start off with your lights at "medium" - around 40,000 lux - and only go up or down if you need to. (Anything between 20K and 80K is usually fine for most corals.)
Are you saying 20k to 80k on the surface of your water? I have a lux meter, but want to make sure I'm measuring at the right place.
It's hard to have too much light for acros but you have to acclimate them to artificial lights, this takes a long time! I usually recommend starting them out very low then moving them up higher ever 2 weeks!
And yes I use a par meter, I don't recommend lux meters they are not an accurate way to measure useable light.
But its an inexpensive way to judge intensty. Lux is one ingredient in par.And yes I use a par meter, I don't recommend lux meters they are not an accurate way to measure useable light.
And yea, he could use some spectrum. Or nutrition. or vinegar dosing.A friend of mine has a 4'X 6' grow out with 4 400w halides all running 10k halides which I don't agree with because his grow like crazy but have no color compared to mine
Agreed whole heartedly.as long as your coral is conditioned to tank conditions your ok to run in higher lighting!
Get a PAR meter Most LFS let you borrow one. Best way to know where you should place your coral.
Yes. at the surface of the water. But corals are pretty hardy and many do well in lower (and higher) lighting.Are you saying 20k to 80k on the surface of your water? I have a lux meter, but want to make sure I'm measuring at the right place.