This is the construction of an LED light panel that exhibits both Genesis 1.3 and Genesis 1.4 (somewhat bizarrely).
The original plan was to house the LED panel in a project box with a translucent white diffusing screen in front of them (which is why I painted the circuit board white). It transpired that the project took a long time to build during which period, the wiring was largely rectified. Thus the project was never truly brought to completion. My desires changed also. I had wanted to have two light boxes set up so that I could do bauble photos. My original idea had been to have a couple of flashlight bulbs in project boxes with the interiors painted white and diffusing screens in front. As always I fancied a more technological approach because I'd heard such great things about light panels. The result was a project that took so long to complete that really it was abandoned when a pair of project boxes and flashlight bulbs would have been half an afternoon's work. As always the KISS principle applies - keep it simple.
Building the board was pretty simple - I just soldered the LEDs on rows and then interconnected the rows with the cut-off ends from the LED wires. Then I just soldered a pair of C batteries to the board with a switch. It was time consuming and since the LEDs were mail-ordered via e-bay from China, they probably weren't by any means, the best LEDs available. My experience of things from China has been very varied.
I have probably commented before that I bought an LED light bulb from China when they were brand new on the market and thus horribly expensive. I never really used it and in the end put it in my hallway here as a light. It wasn't all that bright but it worked to illuminate the stairwell, even if it did light everything in a deathly blue light. 6 months after I installed it, some of the LEDs went out. A week or so after that, they all went out. It was a shame but it was from China. A couple of times I've had things from China that weren't up to expectations.
As you can see from the quick cell-phone photo, half the LEDs in the expensive Chinese LED bulb have gone out. When I had a good look at the thing, it was all glued together and impossible to disassemble to fix without destroying it. I now have a CFL in its place.
I am not the only person to have problems with LED lighting. Generally it seems the LEDs will last a long time, dimming to half their specified brightness over 40,000 hours. The circuitry behind them is what seems to fail first - after possibly 800 hours. There's more of a case for low-powered halogen lighting or even krypton lighting.