New LEDS replacing T5's Help

On my 90 I was running T5 6 lamp. 2-aqua+, 2-aqua spec, 1-fiji purple and 1-super actinic.

I purchased 2 120 watt dimmable LED full spec light fixture. Specs are as follows:

Circuit 1 - 8 warm white(3500-4500K), 8 neutral white(6500-7500K), 8 cool white(10000-14000K), 2 green 460nm and 2 deep red 660nm

Circuit 2 - 20 blue 460 nm and 7 royal blue 450nm

I got PAR readings from the t5's. My question is do I want to keep the same PAR readings or would I want it a little higher? I figured once I have my PAR where I want/or should be, I will mark that as my max level, then begin to acclimate over a month or so. New to LEDS, so any help is appreciated...

 

I think you are over thinking this a bit. I would set the blues to 50% max, and the white to where you like it (probably between 25-35%). Leave it there for a week or two, then raise each by 5%. Do this until you are happy (i.e. no browning nor bleaching of SPS). I bet you will end up with them around 75% max.

Keep in mind PAR does not tell the whole story...

 

I have 3 of what I thought were the same lights.
, 1 was bought before the other 2, and from a different supplier.
The outside look the same, and the colors and bulb placements are all the same,
But I did notice the ones bought a few months later seemed higher.
My local/regional club's PAR meter confirmed this!

On my more powerful ones, I now have the bluer channel at about 90%,
the whiter channel all the way down to 37.5%. These things ARE PAR monsters!

Marshalls advice sounds good

 

Thanks for the tips. I'm not up to par on PAR. I was told to get readings from old fixture, then set new fixture to that. Reason for asking is because I've just seen that other 90 gallon tanks have way much more PAR than I have. My tank is only 2 months old and I have plenty of room for more corals.

I will be doing another reading this weekend. I know it will take some adjusting since the LEDS sit 15" above the water as opposed to the T5's sitting 6" above...

 

Please let us know if the adjustment on the new LEDs over the tank makes any difference on the PAR reading. I am looking to get 2 120 for my 56 galon tank but I am not sure what to get yet. Any advise is welcome guys!

 

My lights are mounted to channel c aluminum and currently sit on top of of the tank. From the top of the tank, I have roughly the same PAR readings as with my T5's. They are 15" above the water, blues are at 100% and whites are at 90%. I can lower my lights if I choose, I would just have to modify my canopy a bit.