When I renovated my kitchen, I used the H7ICAT hi-hats. ( insulation rated, air tight). from what I read on the spec sheet on Cooper's website, there are only like 6 or 7 trims/baffles you can use.
When I installed it, if you look up into the hi-hat, you can see some of the inside of the housing. It seems that either the baffle is too wide on top , or the bulb is too small. I did push the adjustable light socket all the way up, so it's as far up as it will go. It's really not noticeable unless the light is off and if you look up. I was just curious if anyone encountered a similiar problem