I'm only chiming in here to talk about aesthetics. I have a couple of 4" halogens that provide spot (task) lighting for my prep area - they are fabulous, but due to being installed in a "light bridge", they're only 4' off the counter. I also have 5" compact fluorescent cans in the kitchen and 6" incandescent cans (old) everywhere else. Aesthetically, i like the 5" best -- the 6" cans look enormous by comparison, and you need too many of the 4" cans to do the trick.

The problem with all of this lighting is that each one is more than likely different color rendering from each other. If you could post a photo of everything, that would really help. Well with 6 inch cans, you can dim them down, and keep them at a certain level. The 4 inch cans don't give out as good of a beam spread and there are not a lot of good choices for 4 inch LED cans other than the Cree lr-4 and a few other brands, but their pretty pricey. If you think 6 inch cans are too big and unattractive, you have ruled out the best lighting choice for your kitchen. Every client that has used these lights loved the looks and performance. http://www.halogenlighting.com/led-recessed.html Mike

First, about the can trim. The "clear" trim (silvery) and "haze" trim (dull golden) are designed to reflect the most light while not producing much glare. The black baffle trim reflects the least glare. Personally, I dislike the look of all three of these. I prefer white baffle trim. I would rather put up with a little glare when they are on and have them disappear better into the ceiling when they are off. Secondly, the size issue. I chose 5" cans for my 8' kitchen ceiling because I think that size is the best tradeoff. The 4" cans don't spread their light very wide, so you need more of them, getting the "swiss cheese" look. The 6" cans are less attractive to me due to their large size. If you want fluorescent, you can buy a special 5" can made to hold the pin-base type of fluorescent bulb. That's what I did because I live in California, and a certain percentage of fluorescent lighting is required here as an energy-saving measure. As rjr220 said, fluorescents can't be dimmed, although I did manage to find some bulbs with acceptably an acceptably warm color, so I don't hate them. I haven't seen fluorescent floodlights made to fit in a 5" can, but they might exist. What I did over the sink is the 5" can with a PAR 30 50 Watt bulb on a dimmer, which is what I really prefer. These put out plenty of light, much more than the fluorescents do. In older parts of my house I have 6" cans that I put fluorescent bulbs in. They put out decent light, but I think the 5" size looks MUCH better. Juno is considered a better brand than Halo. It is supposed to be a bit better constructed, and has many more trim options. I have 5" Juno in the kitchen, and 6" Halo in my office. What I dislike about the Halo is that when you look up at them, you can see around the lightbulb into the guts of the can light. The Junos are not like that. The newest option with is energy saving are the LED cans, which Juno makes in 5" and 6". I don't know much about them because they have only become available recently. I think they are more expensive. You might want to check the lighting forum, also. Good luck with your renovation.

It's all about the lumens, there are 4 inch trims that will give off as much light as a 6 inch. You will want to look for color temperature as well. The linked article may help you... https://progresslighting.com/wp-content/uploads/2015/07/Recessed_Guide_web.pdf