Par rating for medium light?
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Old 12-17-2012, 08:02 AM   #1
rollinghills
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Par rating for medium light?


What's considering medium light? Read the posts here one says it's 30-50 while another says 70 to 150. Maybe I'm just reading it wrong. Anyway what type of light would 2x 14w spiral CFLs give me? My hood has 2 bulb bases in the middle. The bulbs will be in a horizontal position.

This is the bulb I'm considering.
http://www.amazon.com/TCP-TruStart-5...ords=tcp+6500k

The light is 12in from the substrate. It's for a 15 gallon tank.
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Old 12-17-2012, 08:15 AM   #2
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35 - 50 mmol per square inch of PAR would be considered medium light. Not sure where you got the 70 - 150 mmol per square inch numbers from.

Any reflectors?

I would say medium light, given that you are mounting it horizontally, and the likelihood that you don't have a good reflector, etc (loss of light due to restrike).
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Old 12-17-2012, 01:03 PM   #3
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Quote:
Originally Posted by Darkblade48 View Post
Not sure where you got the 70 - 150 mmol per square inch numbers from.
Here:

http://www.plantedtank.net/forums/sh...2&postcount=21
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Old 12-17-2012, 05:33 PM   #4
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Yea that's the one. Sooo which is right?

My hood does come with a reflector.
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Old 12-17-2012, 05:37 PM   #5
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Quote:
Originally Posted by rollinghills View Post
What's considering medium light? Read the posts here one says it's 30-50 while another says 70 to 150. Maybe I'm just reading it wrong. Anyway what type of light would 2x 14w spiral CFLs give me? My hood has 2 bulb bases in the middle. The bulbs will be in a horizontal position.

This is the bulb I'm considering.
http://www.amazon.com/TCP-TruStart-5...ords=tcp+6500k

The light is 12in from the substrate. It's for a 15 gallon tank.
Hi rollinghills,

What size aquarium; what depth to the substrate?
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Old 12-17-2012, 05:41 PM   #6
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It's 15 gallon. Light is 12 inch to the substrate.
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Old 12-17-2012, 05:49 PM   #7
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Hi rollinghills,

In my low tech, non-CO2 10 gallon I use 2X 10 watt cfl with good results. I do dose Seachem Flourish Comprehensive and Seachem Flourish Excel as a carbon source.

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Old 12-17-2012, 09:10 PM   #8
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Quote:
Originally Posted by Sluggo View Post
Quote:
Originally Posted by rollinghills View Post
Yea that's the one. Sooo which is right?

My hood does come with a reflector.
Should ask Hoppy or i4x4nMore where they got those numbers from.

Though i4x4nMore has not been active since August 2012.
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Old 12-17-2012, 09:19 PM   #9
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around 40-60ish is med, anything above is high or extremely high.
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Old 12-19-2012, 08:39 AM   #10
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Look at the meters reading/ units. Looks like it isn't in inches
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Old 12-19-2012, 09:36 PM   #11
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Quote:
Originally Posted by biogenetic40379 View Post
Look at the meters reading/ units. Looks like it isn't in inches
PAR is usually measured in umol per metre squared per second; the PAR meters in i4x4nMore's and Hoppy's post are measured in the same units.
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Victor Pimp #33 - HPT272-125-350-4M
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