I wouldnt spend time with dimmers myself, I always keep my lights at full intensity anyway.
too bad you are going to have lights that far exceed your growing capabilities
Respectfully, from the pics I've seen of your grow room it looks like you have a lot of vertical room to work with - which allows you a lot of flexibility with just raising the lights. With height limitations, I think dimmers can be a saving grace. My tent (for instance) is 6'6", unless I take my light off of the pulleys and connect it directly to the top bars, I need 14" of top clearance. 7-10 gallon pots are around a foot tall, so that leaves about 54" of plant space. It gets eaten up fast. Currently I'm keeping my COBs around 32" over my plants.
In my admittedly limited experience, the best thing a newbie with intense COBs can do is give themselves PLENTY of room to back the lights away. Most of the nute and leaf issues can be mellowed or slowed by moving the lights further from the plants while we're figuring out how to react. But, if height is not available, dimming is a good substitue. Just my opinion.
Actually, I don't know that I'll ever run mine as close as others do. I've chosen to go a very simple grow medium route, so I'm gauging my lights to work within those limitations. If I find my yields are not sufficient I'll have to up my game, but for now I'm focused on simplicity and easy maintenance.
