I replaced most of my lights through M4 Products. I still have to get a bulb for the step and for above the sofa. The brightness was comparable. I went for the brighter led above the sink in natural white at 600+ lumens.
I am trying to decide between natural white and warm white for above the sofa with reading light as a consideration.
The lumens for the M4 leds in the main cabin is about 360. I replaced the bulbs in the bunk fan/light combo with the M4 night lights which cast the right amount of light for the bunk ends.
You will be happy with the reduced power drain on the battery. We camped in the forest last weekend with good results. Next week, we are off to Fort Wilderness; so, we will have better light while the mouse saves on electricity.