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#### foxbat426

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Hi, it might of been answered here, but what is the proper way to compare LED lighting strength (watts) vs florescent lighting strength (watts). Is there a rule of thumb with this? Also how about Kelvin?? I have never seen LED lights rated in Kelvin Temp? This would be for a planted tank. Love LED and the way they look, but don't know how to go about sizing them for a given tank size. Thanks!

John

#### xmas_one

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There is no rule of thumb. You could compare them by par, but eve that is up for debate.

#### jeffkrol

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Hi, it might of been answered here, but what is the proper way to compare LED lighting strength (watts) vs florescent lighting strength (watts). Is there a rule of thumb with this? Also how about Kelvin?? I have never seen LED lights rated in Kelvin Temp? This would be for a planted tank. Love LED and the way they look, but don't know how to go about sizing them for a given tank size. Thanks!

John

LED's are often rated in Kelvin.. As to comparing strengths ... assuming T5ho and efficient reflectors.. 1/3 to 1/2 W.... to 1W ... I made that up..based in part on this:

4= t5Ho 36" @ 15" =160 par.. that is 156W
Kessel A150= 90
32 Watt Maximum Input Voltage 24 VDC ± 5%

Roughly to get equal "PAR" you'd need 1.73 Kessels = 55.36W

55w = 156 = 1/3 ratio approx..
someone could probably clean that up a bit..... mathematically
speaking..
I picked 2:1 to not go backward and to add a "fudge factor"......
For what its worth........

Oh back to K.. funny thing for the Kessel:
*Color temperature for reference only, and is not a direct measurement of CCT
http://www.kessil.com/aquarium/A150.php

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