You won't save that much money but there are other big advantages. I replaced all of mine with LEDs except for the fridge light. The biggest plus is if you are boondocking they don't drain the batteries anywhere near what one incandescent does. After trying many different ones I found these to give the best light and I can run about eight of these with the same power draw it took to run one incandescent:
Gold Star 1141 Replacements:
http://www.amazon.com/gp/product/B00BSFZQCI/ (currently out of stock but these should be available again as they have sold them for a while) The 280 Lumins is important as that makes them as bright or brighter than the incandescent 1141.
They don't give off any heat and won't discolor or melt the lenses.
I used these for the spot lamps in the bedroom and the vanity in the bathroom:
Gold Star Vanity Lights:
http://www.amazon.com/dp/B00APJUESE/Long Neck Wall Lamps:
http://www.ebay.com/itm/221203295443
