Originally Posted by CaptainJustice
Details on parts please?
Sorry for the delay responding but we had problems with the RV getting home (engine, furnace, toad wiring) and I've been trying to catch up with everything I need to do.
I can't give you full details because the vendors for these products change on a weekly basis. Both items used in the fixtures were purchased on eBay and direct shipped (free) from the Far East. These items are available in single lot quantities or bulk purchases of 2-10 items.
The voltage regulators are DC-DC LM2596 buck regulators. You feed power in (two wires) at one end of the circuit board and power comes out at the other end. There's an adjustment on the board to set the output voltage. If you're doing a number of fixtures, buy these from a vendor that's selling a 10-pack. I rewired the fixture so that the fixture's switch interrupted power going to the regulator, which eliminated all power draw when it is turned off. Mine are set at 11.2V, which has each two bulb fixture drawing just over 500ma, much less than the two incandescent bulbs. I also discovered that the ceiling under fixtures that had incandescent bulbs in them had turned brown from the bulb's heat. I'd prefer to set the voltage a bit lower to decrease power consumption but my travel companion insisted on the slightly brighter lighting at this voltage.
The light bulbs I used can be found by searching eBay on "48 LED panel". I purchased the cool white ones which are closer to daylight light than the warm white ones. Get the ones with the three attachments for different types of fixtures and you'll be able to use them anywhere. I was even able to put them in the round fixtures that had (very hot) halogen bulbs in them. This required a little bit of work to make connectors that fit the fixture.
The LED panels come with a double sided adhesive back. I found that they would stay in the fixtures only if the metal heat shields were removed because there isn't enough flat surface with the heat shields installed to hold the panels. Another cure for this problem is to tack the corners of the panels with hot melt glue. I used one panel without a voltage regulator and the adhesive pad shrunk and curled up because the LEDs were running very hot on 13.4V. That fixture now has a voltage regulator installed in it.