Par reading for 2 ATI bulbs

[sprite]

Can someone get it or link me to some par reading for just 2 36" bulbs running? Preferably blue+ and Coral plus. Tia

[drtrash]

Was told 2-24" c+ &b+ were around 100

[zsuman101]

it depends on the fixture you are using

[Mark Bianco]

Par reading or values is effected by fixture somewhat, but mainly effected by distance away from the light.

Might I suggest www.brstv.com many studies / videos on T5 lighting

HTH
Mark

[sprite]

I know it depends on fixtures, I just want a ball park figure. It's the reading is from an ATI fixture I'll know it will be a little lower on a retro I pick

[Mark Bianco]

Your asking for a number that can range from 0 to 500 depending how far the sensor is away from the light source. Also are you asking for dry readings (thru air) or thru water and how deep. How par readings / values work is not only determined by the light source itself but where you take the readings.

We are trying to help its just the answer you are asking for cannot be determined until you define the parameters.

[sprite]

Thanks Mark..Through water, 8" deep and post how high the fixture was hanging

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[Mark Bianco]

The only real data I could find is 4 and 6 bulb fixtures at 6 and 10 inch depths with the fixture hanging 8 inches above the water line. Doing the math and applying a little fuzzy logic You should see directly under the light at 8 inches thru the water a par value of around 150 to 200. The further you move out away from the center (front to back) the readings will drop off significantly. I am not sure of what size tank you are trying to light or what corals you want to grow, but for softies you want to be in the 150 to 175 range. If you want to grow something more light demanding SPS corals or clams and even some anemones then you should look at something different.

Fuzzy logic is not an exact science but its the best I can do...

Hope this answers your question. Happy Reefing

Mark

[sprite]

The tank is a 12g long that's 36x8x9.. Thanks for your input

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[Joe Kelley]

Great question Sprite, not much info on a 2 bulb T5 PAR value.
I've wanted to add 2 AB+ to our 3 G3pros for a while and was looking for a PAR reading from someone. My question would be 2 48" T5 AB+ 9" off surface and 18" under water. Another 130 watts on the power bill I'd expect some light energy.

Joe

[sprite]

Great question Sprite, not much info on a 2 bulb T5 PAR value.
I've wanted to add 2 AB+ to our 3 G3pros for a while and was looking for a PAR reading from someone. My question would be 2 48" T5 AB+ 9" off surface and 18" under water. Another 130 watts on the power bill I'd expect some light energy.

Joe

I can't find anything on just 2 bulbs lol

[jda]

I tested singles once. CP were about 50 per bulb about 8-10" under the water directly under the bulb. This was on AquaMedic fixture with single reflectors.

Two bulbs were about 80-100 depending on where I had the sensor. They fell off pretty quickly to the front and rear.

I would factor in about 35-50 per bulb.

[sprite]

How high was your bulb off the water jda?

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[jda]

I don't really remember. I usually have my stuff like 4-6", so probably in that range... Sorry.

[sprite]

Thank you sir

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[jda]

I just turned by Halides off and tested the CP on either side for you. 6" off the water and about 12" deep (half way down a 120G tank), they were 58-61 directly under and 56-60 in the middle of them (where they halides would be). This is on an AquaMedic fixture with individual reflectors and the acrylic shields on (these are just supplements). This is with the newer Apogee MQ-510 which gets more blue, so that is why the output is higher than the older unit.

You can probably add 10-15% more output on these for the spectrum below the PAR meter capability.

Hope this helps.

[jda]

FWIW - I also tested just the VHO on my other tank and a single bulb is about 119-121 directly under, so double the PAR, but also double the electricity.

[sprite]

FWIW - I also tested just the VHO on my other tank and a single bulb is about 119-121 directly under, so double the PAR, but also double the electricity.Awesome thank you

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[sprite]

FWIW - I also tested just the VHO on my other tank and a single bulb is about 119-121 directly under, so double the PAR, but also double the electricity.With 2 bulbs I should be at about 100 on the sand in a 9" tall tank running b+ and a c+

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