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post #1 of (permalink) Old 01-20-2013, 02:20 AM Thread Starter
Algae Grower
Join Date: Jan 2013
Location: Mesa,Az
Posts: 34
Noob LED lighting question

Im in the process of planning out a planted tank. Ive had lots of tanks in the past and have always wanted to try a planted tank, I scored a free 45 gallon bow front today so its starting soon.

Im having some issues with figuring out the needed lighting.

Im planning on going for around 70 PAR( I thought I read this was medium, now its looking like this is high, can someone clarify?), this is a good start in a medium light, I want to start the tank without CO2 and then later on add it as I add more power to the lighting system... if I decide too.

Im using Hoppy's Excell and this is what Im finding:

LED spacing 2.25
PAR 70
rows 3
height 24"
cone angle 60

This shows that I can use Cree XP-E-Q5 LEDs at half power to get where Im looking to go.

My questions are this

1) the LEDs say their angles are around 125. Do I need to use LED lenses to get the desired 60 degree angle?

2) how far should the rows be spaced?

3) how long should these rows be? My tank is about 3 feet long. Im assuming that the strips should be as long as the tank.

Am I on the right track? I know Ive got alot more reading to do but these will clear up alot of confusion for me.


Last edited by unicknn; 01-20-2013 at 02:51 AM. Reason: sp
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