The cabinet door switch turning on the lights was a huge convenience for me. I have only one light in there with a grow light CFL on our refugium on the Apex. I used to have to pull out my phone to turn it on/off every time I was inside the cabinet. Now it just works like magic. This is the switch: http://www.amazon.com/gp/product/B0009SUEZY It's a little more expensive, but I bought a cheaper version that arrived and never worked before that. I also have an extra madison float switch if you want one. I was going to put it in my skimmer cup, but there wasn't enough room.