For interior lights, the cheap LEDs are fine. I learned alot about LEDs about 2 years ago when I set out to convert my entire RV (lots of boondocking, so lighting current was always a major issue). One thing to mention is color temperature; many people like the warm white (typically around 3500K, which is kinda yellow, similar to incandescents), I personally like the daylight white (about 5000K), but not cool white (6500K & up) which is kinda blue.
Anyway, I replaced more than 25 individual bulbs with LED bulbs and/or panels. All cheap LEDs from Amazon & eBay. None with heat sinks, although I can see the benefit. Ended up with double the light output at less than 1/4 the current. 2 years later, have not had a single failure or problem.
The LEDs I used in my H3 interior are similar to the 3rd one shown in the OPs first thread, although with 12 LEDs rather than 16. 5000K so they are "white", not yellow nor blue. I think they cost me about $3 each, including shipping. I've also replaced the under-dash lights, the visor mirror lights, and finally just did my back-up lights as well (had to wire in a load resistor for those to get the backup camera to work correctly; the low current messes with the BCM).
