I am a commercial electrician so I know all about LEDs and their limits and colors. In fact, check out the picture below of the last job we just completed for a large park in the City of Chicago. All LED in the whole building. Pretty amazing how far they have come.
I prefer warm white. The cool white in a camper reminds me of an Aerostream and makes me nauseous. And yes, 2.5 watts is fine since each fixture has 2 lamps. I could probably even go less.
Even at 2.5watts I would be going from 200 watts to 25 total watts on those 5 fixtures. 2 amps vs 16.6 amps is a huge difference and will work the converter less and help the battery when dry docking.
canopy 1 by
RoyBelluomini, on Flickr