Multichip Led Light Build Questions

[nimoryan]

I am in the process of ordering the parts to build my light fixture.

I think I have decided on a 72" long x 36" deep x 30" tall dimension on my reef tank build, out of .708" acrylic. It will be a mix sps tank with assorted clams etc in it.

I want to build a Led fixture I can power here. We are 240v 50hz power so not an exact switch to USA where I am from. Most of the Meanwell drivers are dual voltage and dual HTZ rated so I should be good there.

I am going to control this tank with my Neptune Apex controller and want to use it for the lights in particular. At the moment I am thinking about running

4 50w hydbrid multichip LED's, =200w
6 20w rb multichip LED's, =120w
6 20w 20000k White multichip LED's, =120w
4 10w 10000k White LED's, =40w
20 3w Asst Color Cree LED's for effect and target lighting. =60w

This totals 540w of lighting. Will these lights reach the bottom of a 30" deep tank? The light [er gallons is fairly on but is anything else. Or rather what am I missing.

If I want to do dimming and programing what light sequence / driver combination would be the best for driving these? I prefer MeanWell drivers but am not opposed to made in Taiwan specials.

I have only ever used LED's for accent lighting in aquariums before and I have been reading a lot of posts here to try and figure out what the best rout is but wanted to ask for thoughts first.

 

[nimoryan]

Ok so I am still looking at all of this to try and get it figured out. I think after a few hours of reading that I am coming closer to a conclusion. I would love others input here, I have done a bunch of reading and I think my head is wanting to pop with all of the info.

Using the 3w formula of (L x W)/16= 72"x36"=162 x 3 = 486 watts.
since these are going to be dimmed I will overshoot this a bit so my goal is 486 watts plus 20% or 98w = 584 watts I also plan to use the LED's that can be overpowered, ie 100w multichip LED's that are rated at 250w.

The pattern bellow gives me 594 watts which is on PAR with where I want to be. Especially since the sunset LED's will only be used for a short while in the early am and pm for effect, which puts me at 570w.

I will arrange these in three pendants with a nvidia 7900gtx cooler for each 100w led along with 90 deg optics.
I will do a mix of optics and amd socket 756 heat sinks in a circle array for the rest. I am still working through the pattern to arrange these in.


3 100w 20000k multichip LED's, =300w
3 20w rb @450-453nm Royal Blue multichip LED's, =60w
3 20w rb @ 445-449nm Royal Blue multichip LED's = 60w
6 10w 10-15k White hybrid multichip LED's, =60w
3 8w 1900k Sunset Multichip LED =24w
30 3w Asst Color Cree LED's for effect and target lighting. =90w , colors will be 6 UV 416nm uv, 6 405nm uv, 6 430nM Uv, 6 deep red, 6 turquoise

The 10w LED's will be driven by Meanwell LPF-40D-42 or similar
The 8w and 3w LED's will be powered Powered by Meanwell ELN-60-48d's or similar run in a series circuit.
Still working out the 100w drivers and the 20w drivers..... any suggestions, and would love input on the rest of it as well.

 

[funkyfish77]

I'm using 8 20 watt multi chips to light my 120 . 2x 14k 4x super actinic hybrid and 2x 420 nm chips
No reflectors . I have clams and sps and a few lps in tank . The clam and monti cap are doing great at the bottom of my tank (25" bare bottom) . Are u planing to do pendant style lighting or 6 foot heat sink?

Funky

 

[Mike31154]

I'd recommend sticking to one or two different wattage multichips to keep things a bit simpler. Either go with a few 100 or 50 watters with optics mounted a bit higher, or a whack of the smaller 10 to 20 watters without optics mounted close together & closer to the water surface. This keeps driving & heat sinking the LEDs a bit simpler and the choices are out there to achieve the color & penetration you're looking for with most sizes of multi chips these days.

 

[Lassef]

Ok so I am still looking at all of this to try and get it figured out. I think after a few hours of reading that I am coming closer to a conclusion. I would love others input here, I have done a bunch of reading and I think my head is wanting to pop with all of the info.

Using the 3w formula of (L x W)/16= 72"x36"=162 x 3 = 486 watts.
since these are going to be dimmed I will overshoot this a bit so my goal is 486 watts plus 20% or 98w = 584 watts I also plan to use the LED's that can be overpowered, ie 100w multichip LED's that are rated at 250w.

The pattern bellow gives me 594 watts which is on PAR with where I want to be. Especially since the sunset LED's will only be used for a short while in the early am and pm for effect, which puts me at 570w.

I will arrange these in three pendants with a nvidia 7900gtx cooler for each 100w led along with 90 deg optics.
I will do a mix of optics and amd socket 756 heat sinks in a circle array for the rest. I am still working through the pattern to arrange these in.


3 100w 20000k multichip LED's, =300w
3 20w rb @450-453nm Royal Blue multichip LED's, =60w
3 20w rb @ 445-449nm Royal Blue multichip LED's = 60w
6 10w 10-15k White hybrid multichip LED's, =60w
3 8w 1900k Sunset Multichip LED =24w
30 3w Asst Color Cree LED's for effect and target lighting. =90w , colors will be 6 UV 416nm uv, 6 405nm uv, 6 430nM Uv, 6 deep red, 6 turquoise

The 10w LED's will be driven by Meanwell LPF-40D-42 or similar
The 8w and 3w LED's will be powered Powered by Meanwell ELN-60-48d's or similar run in a series circuit.
Still working out the 100w drivers and the 20w drivers..... any suggestions, and would love input on the rest of it as well.

For my taste you will have too much yellow in the tank. The 20 000 K I´m used of (the one thats is true 45 mil LED and can be overdriven) give a to yellow touch for me. The same vendors hybrid chip give a too blue touch for me but probably I would go for three of the hybrid 100 LED chip and surround them with 20 White 20 000 K without lenses. Of the 3 watts - take it carefully with the deep red - they can dominate everything - make them separately dimable.

Sincerely Lasse