I removed the metal screen from the underside of the upper dome opening and replaced it with an oval piece of transparent red styrene sheet. I then packed AVES around it. The metal screen cast a cross-hatched pattern onto the inside of the dome when lit from underneath which I didn't like. Two 2mm red flat top wide angle LEDs will illuminate the dome. They will fit up and thru the holes in the thin oval Evergreen styrene sheet which I covered with adhesive backed aluminum foil to help reflect the light upward into the dome.