AFAIK, there are no 4" remodel on the market that are ICAT (insulation rated/air tight). So if it's attic above then rule out 4". I did 5" cans. I went with Halo housings and elite trims. You may want to see the trims in person since they make look different than what is on the website (e.g. gloss/flat, color, finish quality etc). The 5" trims fit snug around a r30 so you can't see up into the housing, unlike some 6" I've seen. Check out lumen rating. Of course the 4" are not going to put out nearly as much light as a par30/r30 at around 900 lumens

I know this is an old thread, but I saw the black alzak lights and loved them, did my house in them nearly everywhere (that I was putting cans). They are amazing, if you ask me.

I moved and now just am renovating my kitchen and put them in. I am curious, however, why you say no LED light bulbs in them? I am currently on a hunt for LED bulbs for my 2 6 inch for general lighting and 5 4inch for task lighting over the countertops.

Anyone know a reason why LED bulbs can't be used with the black alzak trim?

Thanks!