Thanks Jeff. So are you suggesting 1W/G all together or just the CW+WW.
Plan is 21CW:7WW:4R:4DR4RB:4G:4C:4A, gets to (52 LED/fix)x4. On whole calculates to 624W
Waiting for the signal...
That should be fine. BUT this tank is very large and a bit beyond my "comfort zone" of napkin calculations..
That said, using a typical greenhouse recommendation for growth of plants 405W over 1.5 sq meters (estimate based on interpolating T5 to LED) is a good guesstimate for growth.
As to the LED choices.. seems fine. There is more than one way for this..
Originally Posted by Siddhartha Saive
The tank will always be low tech. Won't be adding plants to the substrate. The plants are mostly anubias ferns and mosses. So won't need high light intensity.
So looking for the led number that will be good enough for a good display running at around 70%
70% of 624W is 437W.. so the above run @ 70% is theoretically in the ballpark..
This is a very large tank and over lighting it is virtually impossible short of putting an led right next to each other over the entire 2.23 sq meters of surface area..
The above is an LED every 4x4" area on average... a low density..
This is really the best "I" can do w/out more experience over a large tank..
Use some commercial fixtures as a guideline:
THE best way to approach this would be to build one module and check PAR @ 3 feet or whatever distance yo calculate from light to substrate.
You can test in air..
272W.. Just checked w/ Kessil's calculator.. and that is the recommended light level for this size tank.. They do have a disclaimer regarding larger tanks though..
388W would be what you'd consider using a 70% baseline..There lights are good for a 24" circle approx. and fairly high PAR to about 24" @ 36" they would probably be low..
Depending on the brand of LED and what optics, if any you choose.. the 624 is still in the ball park..
Remember that most likely your LED's from the start will not be driven to 3W each..or you shouldn't, for heat considerations.. The real wattage will most likely be around 2, before dimming.
Of course the driver ma's is your choice..