LED's are the way to go! I dry camp 99% so power consumption is critical. One quality LED uses a 1/10 the power of regular bulbs- That's 10 LED's to one incandescent bulb folks! Plus they produce almost NO heat. But watchout, there are good LED's and lousy LED's. Don't go cheap! You can really get cheap, like a dollar a piece, but you get what you pay for. They are generally an ugly "white" light and some of them turn blue'ish after they're fully warmed up. I spent $20.00 a piece and that was on E-bay! The E-bay seller is frank-warehouse I have no affiliation with him/her. So far these LED's are the best I've used. As shown they are flat rectangular and take about ten seconds to install! They provide a light right on par with an incandescent, nice soft white color. My wife, who hates LED, likes these! Again, they are expensive, but should last years. I also changed all my outside lights tail lights, Porch and even running lights to LED. I used the cheaper very small 194 for running lights. Ten (yep 10) for just a few bucks, those are fine. The interior is where you spend the money.
My 2012 21ss has 6 regular interior fixtures, with 2 bulbs each. There is also a larger 3 bulb fixture over the dining table. Over the couch there are 2 spot light type fixtures, each with a single bulb. Each of the bunk ends also has a light/fan combo that's clips to the rafter pole with 1 bulb each. The stove vent hood also has a single bulb light. That is 20 interior bulbs if I counted right. Outside there is a single bulb porch light and a single bulb work light at front of the camper near the hitch. All the interior lights are 921 wedge base type bulbs and the exterior bulbs are 1141 bayonet base type. I chose www.prudentrver.com for my replacement LEDs. I used them for 2 years in my popup, and was pleaded with their quality so I stuck with them in the Roo. There are countless brands, types, and places to purchase LEDs, but as others have said cheaper is not always better. You get what you pay for in terms of quality, light color, heat production, etc... Don't skimp. It can be a costly mod but well worth it in terms of power conservation. I just returned from 18 days of dry camping, made possible largely by the lower power usage of my LED upgrade, especially since there were fire restrictions in CO this year and we found ourselves inside the camper hours earlier than normal each night.
Thanks a ton, Newtxs... We are weeks away from a our annual 10 day camp adventure in Buffalo Creek (CO). In years past I never let anyone use any interior lights for fear that we'd run out of juice, but I am hoping that this year the combination of LEDs and a solar trickle charger will let us "see the light"!