LED upgrade

superman

Member
Hey all. I'm about ready to make the change to LED lighting. I currently run PC lighting and it's great, but it's expensive to run, hot, and obviously short bulb life in comparison. I've read through a lot of posts on here, but just don't have time to read them all so I'll just put out my questions and see who can answer what. My tank is a 40 gallon and is 36" wide.
-Are the lighting guidelines for LEDs similar to PC? Meaning, I run 2x 96 watt PC bulbs at the moment, which equates to just uner 5 watts per gallon. For corals, I've always used the 4-5 watts per gallon rule. Do LEDs work this way as well? If not what is recommended?
-What kind of spread is recommended for the lights? I've seen many people posting that they get mostly blue, a few white, and a few red. I'm trying to attain maximum color from my corals, and blue seems like a pretty good route for this, but I am curious about other possibilities.
-What do DIY kits usually include? And what extras will I need? The parts I can think of are the bulbs, the housing, power source, and probably a fan. I've had plenty of experience building circuits and the like, and figured this can't be that much different. Also, are the lights typically plug and go or will I be looking to do some soldering? I've checked out a few websites so I have an idea of what's out there, but am just curious what other members have experienced.
I appreciate any insight into an already exhausted topic. Also, if you'd just like to point me to someone else's post, that's fine. I was just unable to find precisely what I was looking for in the posts I've read. Thanks!
 

gemmy

Active Member

Quote:
Originally Posted by Superman http:///t/390849/led-upgrade#post_3463185
Hey all. I'm about ready to make the change to LED lighting. I currently run PC lighting and it's great, but it's expensive to run, hot, and obviously short bulb life in comparison. I've read through a lot of posts on here, but just don't have time to read them all so I'll just put out my questions and see who can answer what. My tank is a 40 gallon and is 36" wide.
-Are the lighting guidelines for LEDs similar to PC? Meaning, I run 2x 96 watt PC bulbs at the moment, which equates to just uner 5 watts per gallon. For corals, I've always used the 4-5 watts per gallon rule. Do LEDs work this way as well? If not what is recommended? The watts per gallon notion is out dated. It is all about the PAR and the way the light penetrates the water. I'm not an expert on this and I hope one of the gurus can come along to explain it better. PC are a very inefficient light. It takes a higher wattage to penetrate water. Now, LED's are more efficient and take less wattage to penetrate water.

-What kind of spread is recommended for the lights? I've seen many people posting that they get mostly blue, a few white, and a few red. I'm trying to attain maximum color from my corals, and blue seems like a pretty good route for this, but I am curious about other possibilities.
-What do DIY kits usually include? And what extras will I need? The parts I can think of are the bulbs, the housing, power source, and probably a fan. I've had plenty of experience building circuits and the like, and figured this can't be that much different. Also, are the lights typically plug and go or will I be looking to do some soldering? I've checked out a few websites so I have an idea of what's out there, but am just curious what other members have experienced.
I appreciate any insight into an already exhausted topic. Also, if you'd just like to point me to someone else's post, that's fine. I was just unable to find precisely what I was looking for in the posts I've read. Thanks!
 

acrylic51

Active Member
For a good DIY kit check out Rapidled they have kits that have just about everything you'd need......
 

superman

Member
I checked out their kits, and they look great, but they really don't provide any information about lighting an aquarium.
 

acrylic51

Active Member
Not sure what type of information your really after.....These kits that I linked are basically what everyone is using, and your already built fixtures are using the Cree LEDs for the most part.....What other information are you after.......
 

superman

Member
I'm kind of curious what size heat sink would be ideal. Do I need something as long as my tank? I'm pretty sure I don't, but some of the dimensions are confusing to me. Should I just look at the total light output area and base it off of that? Also, I'm curious how optics fit in, and how I need to utilize them for my setup.
 

acrylic51

Active Member
A lot of things will come into play with an LED lighting system.....First how are you planning on hanging your fixture..... Optics are somewhat dependent on how high the fixture might be utilized as well. Heat sink size is really up to the individual builder IMHO.....Something on the lines of 12x8 and that would be on the large side of the spectrum I'm figuring.....You don't need the heat sink the length of the tank. The example I gave you as far as 12x8 could easily handle up to 42 LEDs.........

42 mounting spots for LEDs
Can mount 5 Cree LED Strips
Drilled and Tapped Heatsink can have 42 LEDs mounted via 4-40 screws. Extruded Aluminum Heatsink, 8.46 inches wide and 1.3 inches tall.
 

superman

Member
Mounting the fixture itself is still up in the air. I'd prefer to actually mount it vs. hanging because hanging isn't very practical in it's location. Once I figure out the height above the water, I suppose I can go from there. My guess is it will be anywhere from 6-8" above the water though.
 
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