Quote:
Originally Posted by cale262
I was also running 250w MH and T5 before switching to the PS LED,...I started the PS fixture @ 50% and slowly worked my way up to the 90%...then I assumed the Radion was less W Than the PS and there should be no shock when switching the two LED fixtures as previously stated above...I was wrong... LED's are really new in this hobby and from what I have read, we are making a mistake by measuring LED fixtures with PAR....PAR undergrades the blue light spectrums and focus's more on the white/yellows...Higher end LED's used for reef lighting have no yellow as fould in traditional lighting (MH, T5, PC etc) thus measuring in PAR is old tech and not the correct tool for the job when measuring LED...this is also why less expensive 1W LED show more PAR, they have more yellow spectrum to measure yet this yellow is not usable light in reef corals...I think we'll see more about PUR (as oposed to PAR) as the LED fixtures become more common place in this hobby...
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So how do you really measure the light then if par is irrelevant? I am just wondering cause I am getting an AI for my new tank, and going from t5's to AI will be a huge change, I know I have to start it low, but how low is low lol? might seem like a dumb question