Par readings you judge

That's the lights I run over my 300 gallon tank. I run 6 of them over the tank after switching from another similar led fixture and I saw better color, growth and polyp extension from these new lights. I run them all at 100% as I had done with the other lights.

Very helpful ty

Is that with optics or without?

ritter6788 said:

Is that with optics or without?

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I'm not to sure what you are asking. The lenses are 60 degree I think

ms705jk said:

I'm not to sure what you are asking. The lenses are 60 degree I think

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That is what I'm asking. The numbers seem high so I thought it must have a narrow optic. I'd be curious to se the par results with the same light at 90, 120 and no optics. My theory all along is that people's issues with leds are narrow optics and running them at too high % or wide/no optics at too low %. Looking at your numbers I'd run those lights at about 50% depending on the tank depth. Possibly 75% with 90 degree optics and 100% with 120 degree or no optics. Just rambling out loud here. Thanks for posting.

No problem. I felt like the 60's would give me the best lifespan. I'm acclimating from about 20 percent, hoping to get to around 50 percent and stop there. My guess is it'll take around 3 weeks to get there. The tank us 14"l x 14"w x 20"h. This is plenty of light

Mine like these only have 90 degree optics and the old lights I had did have 60 degree optics but were mounted higher than these with 90 degree optics. I measured with my par meter and on the sand bed with the new lights I get around 200 par running at 100% and the older lights I think I was in the upper 200's on the sand bed and they were mounted higher above the water to try to get the light to blend more with the 60 degree optics (so it didn't look like a spot light of different colors over the tank). I do find that the color is better under the newer light with the 90 degree optics for some reason and growth rate is about the same with both lights.

Where do u rent one of these par meters? I was thinking of buying that Senseye Reef pH/par meter thing for $199.

Those reading I see at 100%. 14" is 959 par , is that 14" above the water and that's what it's reading at the surface? Or 14" below the water level. If so how high do. You have it hanging?

Also what par meter were you using ? The apogee200 is a really good one. I would not use or trust that senseye PH/ par meter .

g6gang said:

Where do u rent one of these par meters? I was thinking of buying that Senseye Reef pH/par meter thing for $199.

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My lfs has one they rent out for $25

Rob&Gab said:

Those reading I see at 100%. 14" is 959 par , is that 14" above the water and that's what it's reading at the surface? Or 14" below the water level. If so how high do. You have it hanging?

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The light is 10" above the waterline and 4" deep in the water. All the measurements are from the light down. 30" would be the sand bed

Rob&Gab said:

Also what par meter were you using ? The apogee200 is a really good one. I would not use or trust that senseye PH/ par meter .

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That's what I used

Here are par readings on my tank with no optics. This is with DIY LEDs from rapid running at 100%.

Eckolancer said:

Here are par readings on my tank with no optics. This is with DIY LEDs from rapid running at 100%.

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How deep is the tank and how high are your lights from the water?

Tank is 20" deep lights at the time were about 4" off water. I switched to the new kessils. I need to get a par reading with the kessils.

Yeah I'm curious about the kessils too