I switched ours out. We dry camp a little, not as much as I would like. I have a number of light fixtures to our HTT, and have about 19 light bulbs. I did a test and all of our LEDs use the same power as one incandescent bulb. That had me sold.
We bought cheap china made 48 LED boards on Ebay. I think I paid less than $2 per unit, bought a few extra, just in case. The adhesive foam on them did not last long, so I switched to a heat transfer tape, we had in the lab at work. Others have used a dap of construction adhesive to secure the boards.
Spend some time looking on Ebay. The price for them really vary from vendor to vendor. I found them at a really good price. I bought a few different ones at first to find out what I liked and if they were bright enough. Once I mademyfinal decision I bought a whole bunch.
I just did an ebay search "48 smd white led light panel" and found them for $.98 to $1.7 each. They were in groups of 5 to 10 panels. Still a good price.