I have never grown HC, and my experience with glosso was limited to trying out the dry start method. So, I can't comment on use of T5NOs for growing HC/glosso. I also have never used NO lighting, so I can't comment based on my experience with them for growing any plants.
treelimbjim, that other post was done back when I was still trying to make sense out of designing a LED light. I wouldn't recommend following that method now. The calculator is based on more data and more varied data. If you have taken some PAR measurements with other configurations I would appreciate receiving the data so I can see how it fits in with the other data I have.
This is still an evolving design process, but I haven't seen a better process.
Trying to answer "How many (and type) LEDs to use my 70 gal?" or simply, "Is 24 XPG enough? 36?"
I've been estimating with spreadsheet V.3.
Tank: 48wx18dx20h, 3" substrate
Frame: 1.5" aluminum extrusions, 3 x 48" rails on 5.25" centers.
Table for PAR est. for L,M,H light (see below)
LED height: Tank_height + LED_Height_above_water - Substrate_depth
Conditional format: 1) PAR background is blue, green, orange for L,M,H light. 2) current background is red when >rating.
Table for Spread with LED_Height and Cone_Angle
I'm not clear about how the "rows" work. I'm trying the geometric mean of LED_spacing and my LED_row_spacing.
Trying to validate the calculations, I ran across 84212-designing-building-led-fixture-22.html#post1102937
... and the spreadsheet isn't coming close to real world observations.
The number and spacing of LEDs for any size tank can be calculated with reasonable accuracy using a Excel Spreadsheet "calculator" shown here: http://www.plantedtank.net/forums/di...ml#post1803323 I doubt that you will want to use Cree XP-G LEDs for that small a tank. Perhaps XR-E would be a better choice.
I understand you are the aquarium lighting mentor. I was sent over here from Nano Reef by Evilc66. I am looking for some help with the lighting for my Aquarium.
I am new to the aquarium/lighting arena. I have a Fluval 12 gallon tank with fresh water. I am wanting to grow some high light plants and carpet plants.
I am considering a DIY modification to the lighting. I am looking into getting the CREE XP-G LED's. What do you think is the appropriate amount of cool white led's and the total amount of watts/lumens for the 12 gallon?