Finally got around to changing over my interior and porch lights to LED. Ths is a bit of a copy of what Jage explained above, but here's what I did.
I bought the exterior light here: http://www.superbrightleds.com/cgi-bin/ ... _bulbs.htm
Here’s the exterior with the cover removed.
I just removed the old bulb and plugged in the LED light. I used a little silicone seal to hold the board in place. This is a pretty bright and white light, but we don’t use them very often. Probably a waste of time and money to convert the outside ones for us just for the power savings.
Next I did all the interior fluorescents. Here’s the LED replacement I used.
I got them from here: http://rvspecialthings.com/LEDlights.html
They come with the bayonet plug on the end, but seeing as how the lights are supposed to last 10,000 hours I cut off the plug and hard wired them. These are the warmest color I could find as we don’t like the really white ones. The change over is pretty simple and you could do it without removing the fixture, but seeing as how it’s only four screws I pulled ‘em off. Here’s the stock fixtures with the diffuser removed.
The center cover just pops off to get to the ballast below.
The ballast is held in with two pop rivets and I drilled them out with a 1/8” drill.
The LED comes with peel off stickum on the back and on the 12” fixture I put one in the center.
On the 18” fixtures I put in two of the LEDs.
Here’s a shot of the light with LED.
And here’s the stock light on florescent.
Here’s two of the lights side by side. The one on the left is LED with stock on the right. Photo taken with the flash on the camera.
Here’s the same shot without the flash.
I wasn't sure how it would look with one light in the center of a long fixture, but it's hardly noticable. We like the warmer light, and it’s actually brighter but not as harsh.
Anyway, easy project and the new lights draw less than ½ amp.