You can phase in LED's over time, starting with the most frequently used fixtures. That way you can initially achieve most of the energy savings for something like half the cost.
I just took the plunge on Amazon buying all warm lights
and spent about $50.00 overall with several spares left over. I think I bought at least 3 different style "bulbs" to fit my existing fixtures.
Gotta say their cooler operation and increased boondocking
time make it well worth it, especially compared to the price of a generator
I also bought a roll of the Hit Lights (based on Norm's recommendation)
and now our closet and pantry have top to bottom light
. See closet in picture below.
I also added a strip, with a remote control dimmer, over the table underneath the upper cabinet too. That roll added about $20.00 with switches and dimmer.
We are very pleased with the changeover and additions.
PS. I noticed that some LED's claim they operate at 12 volts, others claim a range of 12-15 volts. Not sure it really matters but I chose the broader range since camper voltage varies quite a bit depending on whether the charger is operating.