There are other aspects you may not have considered. Incandescent bulbs can get very hot to the touch. We have reading lights over our sofa, recliners and bed. These have 1383 incandescent bulbs that get very hot to the touch. If you reach up to adjust the beam of light, you can easily burn your fingers. I replaced all the 1382 bulbs with LEDs, and you can touch them without getting burned. Hot incandescent bulbs can also melt and disfigure plastic light fixtures.
Even if you're staying in a commercial RV park with shore power, some of them require you to pay for electricity. I've never done a cost/benefit analysis of purchasing and running LED bulbs vs. paying for electric, but if you are in your RV enough days of the year, I'll bet it comes close.
Then, there is the "green" effect. Why consume more electricity than necessary?
2016 Ford F350 Turbo Diesel SRW 4x4
2017 Grand Design Reflection 297RSTS
2013 Ford F350 Turbo Diesel SRW 4x4 (Destroyed by fire - 8/29/16)
2014 Grand Design Reflection 337RLS (Destroyed by fire - 8/29/16)