Just another Edge 6G upgrade
The 21 LED to 42 LED light (from Edge 12G) upgrade was unsatisfactory. The light is still concentrated in the middle and all the plants grow tall towards the center and nothing is visible on the sides of the tank because it is in shadows. So I decided to go with Finnex Stingray 16" which is actually physically little longer than 17" - I had trouble fitting the cover over it because it is little wider than the tank.
Finnex Stingray16" http://www.amazon.com/Finnex-Stingray-Aquarium-Light-16-Inch/dp/B00NAFQ97A/
Current USA Single Ramp timer http://www.amazon.com/Current-USA-Single-Timer-Aquarium/dp/B00FDV1AFA/
Fluval Edge 21 LED light http://www.amazon.com/Fluval-Edge-Led-Gallon-Lamp/dp/B00A38Y73K/ (leftover from 42 LED upgrade)
5.5/2.1mm plugs and sockets for wiring.
1/4" black acrylic for modifying cover
JB Weld KwikWeld (FTW)
Dremel, hacksaws, soldering iron, etc etc.
I have cut and glued the acrylic sheets to extend the cover. Unfortunately the light was a little too long so I had to leave opening on one side for the light to fit.
I have cut off the original 21 LED light and used JB Weld to glue Finnex light in its place. Routed the cable in the original frame, down to the box in back on the aquarium, where it connects to the timer.
I think the end result looks pretty clean and the tank is lighted more evenly. The light now dumps over 10W of photons into the tanl. The original light had 0.4A/12V power supply, so at most it had 5W (doubtful). (Strangely enough both 42 and 21 LED Fluval Edge light uses the same PSU.)