What is your best suggestion for having proper ventilation?
Bluntly, ventilation is problematic.
Again, refrigerators, by design, are insulated boxes designed to keep cold air IN.
If you want to ventilate the box, you'll have to cut at least two holes in the box. . .one to let fresh air IN and one to let hot/stale air OUT. You'll want a fan on at least one of those two holes (to blow air out), and maybe both (one out, one in).
Did I mention that refrigerators are typically made of steel? Refrigerators also contain, well, refrigerant, which is in the form of pressurized freon. I don't think you want it spraying on your skin, let alone your eyes!
So what you will probably need to do is:
a. Bleed off the freon, or have someone who knows how do it for you. (Don't ask me how. . .I have no idea!).
b. Cut two holes into your cabinet. I'd suggest both in the back so they aren't visible from the front of the cabinet.
How do you cut the holes? Again, don't ask me. . .maybe with a hole saw? Sequential drilling?
You'll probably want one near the top of the fridge inside to vent hot air (since it rises). You'll also probably want to vent your hot exhaust through an odor controlling carbon filter.
Make sure the holes fit the fans you select (or vice versa).
c. Once you get your lights in place and your vents installed, then you run the cab for a few hours and check the temps.
Hope that helped a little, or at least gave you food for thought.
