M4 provides quality LED bulbs, and excellent advice and customer service. I changed out my entire 5th wheel using their bulbs and all I can say is wow. I had forgotten to order a bulb for the basement and because of postage cost decided to just go to WaLmart for one of their LED bulbs. Looked identical at a fraction of the cost. Found out why when I tried to install it. M4 uses aluminum frames, Walmart cardboard. Bulb bent on the first attempt to push it into the socket. You can buy it once in a quality product, or several times if you go cheap. One caution. I have a scare light on each side of my 3400RL, but both are on one switch. No choice, either both off or both on. We are on a seasonal site and twice with different neighbors, they both asked if I could turn off the light on their side. Said it was like a full moon in their windows. I just disconnected that light, but it is a testimony of the quality and quantity the M4 products give you.
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