Updating recessed lights
Our house is 25 years old and I suspect the original equipment installed by the builder is low quality. I want to replace 2 small (5 or 6 inch) cans and one large (about 8-10 inch)can with new ones that will do a few things: can be retrofitted, seal properly so there are no air leaks, be fireproof because they will be directly under fiberglass insulation, can be adjusted as to where to aim the light, because they are on sloped ceilings and I want to be able to direct the light directly downward, or at an angle, if we prefer that. Lastly, we want to take advantage of the new technology in LCD bulbs, assuming we can get bulbs that can be effectively dimmed. I understand the dimming capability of some is not very good. Also, we want bulbs that disperse the light as widely as possible.
Thanks for your help.