DIY LED Hood: Prebuild Thoughts...

TheMikey · #1 02-18-2011, 08:11 PM

Alright, I lied. But at least I found what I was looking for!

Looks like 70 degree optics make the most of your LEDs:

Source

However, reading through this again, they didn't test the 40 degree. My assumption is that this source is trying to show you how to get the most par using the least LEDs. Take it with a grain of salt, I'm no expert

Bryan · #2 02-19-2011, 01:50 AM

Here is an interesting read on optics in a tank

http://www.nano-reef.com/forums/inde...owtopic=261525

claymax · #3 02-20-2011, 02:12 AM

what would be optimal for a diy fluval edge, in regards to optics, as the canopy forces them to be kept very close to the surface.

Bryan · #4 02-20-2011, 08:36 PM

With the Edge you don't want to use optics as the opening is so small, you want the light to scatter as much as it can When I get a chance I will upload a couple pics of the DIY LED lighting for my edge.

claymax · #5 02-20-2011, 08:53 PM

k cool!

oupulino · #6 04-25-2011, 04:03 AM

It is interesting read .What is best height to hang if you using 70 deg optic for DIY fixture

GMGQ · #7 04-29-2011, 07:36 PM

Here's a good link:

http://www.ledgroupbuy.com/pages/Cho...ght-optic.html

But it also depends on how deep your tank is. The higher you go, the wider the spread, but the less penetration you'll get at the bottom of your tank.

But with a wider optic like 70*, you can afford to go lower, as the spread is already wider. Just think of a flashlight. Take one and hold it vertically, pointing down, and see how the spread is.

Realistically, I would hang the fixture as low as possible, while still giving you enough clearance to reach your arm into the tank to do daily maintenance.

Quote:

Originally Posted by oupulino

It is interesting read .What is best height to hang if you using 70 deg optic for DIY fixture