LED's are a great improvement to the lighting system in an RV. But there isn't any reason to replace all the existing lamps with LED's. If your intent is to save energy when boondocking by replacing the lights with LED's, then only replace the lights you actually use 90% of the time. I replaced one floresent in the main area of the MH, another light over the couch where my wife reads and one in the bathroom. Any other lights are only used now and then especially when boondocking. Keeps the cost down to a manageable level.