04-15-2014, 08:03 PM
Join Date: Jan 2014
Location: Mukwonago Wisconsin
| | Re: LED fixture hack - need advice
Thanks to your pictures I will say it can be done very easily. If you go to a site like Rapid LED's they sell the LED's you will need on the same Star mounts that are used in this fixture.
I have built over a dozen LED fixtures and can say that the LED's are very easy to work with. To remove them there is a screw on each side of the STAR mounting. Then you need to unsolder the LED's you want to pull out. From there you want to carefully pop the Star off the circuit board. There should be some heat paste holding it down slightly.
Knowing most Commercial LED fixtures usually use Royal Blue (455nm) and Cool white (6,000K)LED's you want to be cautions on how much red you add. My personal choice would be to add some Warm White LED's rather than just reds. These LED's are in the 3,700K range and have a lot more red and less blue than your present Cool Whites. I would replace roughly 50% of your Blue LED's with the Warm Whites.
Most quality LED's today are rated at 3 Watts or above. Usually commercial fixtures are set to run them in the range of 350ma to 700ma which means they are using 1 or 2 watts each roughly. Using the CREE XP-G LED's they can run anywhere from 200ma for 1/2Watt to 1,500ma for 5 Watts. So you will be safe using them regardless what the light fixture is using to drive the LED's.
On an additional note for fresh water plants if you pull more than 50% of your Blue LED's then you may want to consider using Neutral White (5,000K) LED's instead of the Warm Whites. This will prevent an excess of red light for your tank but still increase the Red considerably from where you were you were at.
If you were to add RED LED's they do produce a lot of red light and you want to do so very sparingly use and the ones around 620nm. The 660nm Deep Reds are known to stimulate some specific algae growth. The reds also have a max current of 700ma and if the fixture design is powering them at 1,000ma for 3 Watts each they could have a very short life span from being over driven by almost 50%.