

Posted 29 December 2011 - 08:45 PM
Posted 29 December 2011 - 10:17 PM
There is also sunlight shining upon the tank in post #80. Look at the the reflection of camera and hands on the glass. This would not happen if the light was solely coming from inside the aquarium.Those high-powered LEDs are so fantastically bright, their strength looks like sunlight to my eyes!
Edited by EricaWieser, 29 December 2011 - 10:19 PM.
Posted 29 December 2011 - 10:19 PM
Haha, I'm pretty sure that what you are seeing in those photos is indeed sunlight.Those high-powered LEDs are so fantastically bright, their strength looks like sunlight to my eyes!
Edited by UncleWillie, 29 December 2011 - 10:20 PM.
Posted 30 December 2011 - 12:03 AM
Edited by Usil, 30 December 2011 - 12:05 AM.
Posted 30 December 2011 - 08:14 AM
Posted 30 December 2011 - 01:47 PM
Posted 30 December 2011 - 04:40 PM
Posted 30 December 2011 - 05:13 PM
Without the spectrum it's really hard to say. I looked it up on the Lowes webpage but it didn't say the spectrum, either. Under color it just says "soft white".I purchased a 4 light LED light bar (Utilitech model GUO124L-SS-I) for $40 from my local Lowes. It is a 4 LED light bar "suitable for damp locations". These fixtures are linkable to additional fixtures, up to 60 fixtures in series total. They are rated at 0.09A max each....Output is rated at 310 lumens, bright white. Color temperature is 3000.0 kelvins. Color rendering index is 80.0 kelvins. It is rated for 50,000 hours. Maximum fixture wattage is 7.0
...
Erica, based on the color temperature and CRI, can you tell me how effective this lighting would be for plants?
Edited by EricaWieser, 30 December 2011 - 05:17 PM.
Posted 26 January 2012 - 12:51 PM
Edited by LincolnUMike, 26 January 2012 - 12:54 PM.
Posted 01 February 2012 - 02:29 PM
And you can't know the spectrum of a light just by looking at the light's color.
However there IS a relationship between a colour temperature and the peak wavelength in its spectrum. It's called Wien's law.
Wavelength (nanometers) = 3,000,000 / Col temp (Kelvin).
Posted 01 February 2012 - 02:55 PM
Edited by EricaWieser, 01 February 2012 - 03:02 PM.
Posted 01 February 2012 - 03:12 PM
Edited by EricaWieser, 01 February 2012 - 03:12 PM.
Posted 01 February 2012 - 03:26 PM
Posted 01 February 2012 - 03:44 PM
Posted 26 April 2012 - 10:27 AM
Posted 26 April 2012 - 02:10 PM
Posted 16 May 2013 - 03:01 AM
Posted 16 May 2013 - 11:57 AM
Posted 17 May 2013 - 08:25 AM
Posted 17 May 2013 - 02:31 PM
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