Hello, I'm replacing two mini pendant lights with two less-ugly mini pendant lights. They're on a dimmer switch. After removing the old lights and noting how the wiring was set up before, I noticed that the new lights have a different wiring setup in their mounting cans. There are two neutral white wires, two black wires, and two red wires, as well as a bare copper ground. The installation instructions are worthless, and the work I've tried so far has failed (in that the lights do not come on at all, in any way). I also noticed that of the two holes where the lights will be mounted, one of them has two white neutral wires and two black wires, and the other only has one of each. Does this affect things? I checked with the manufacturer and they assured me that the new lights can be used with a dimmer switch. Sorry for such a basic question. I checked the bulbs and they're fine, and although I'm not a dunce and know which are the neutrals/hot wires/ground/etc., I'm at a loss for what I'm doing wrong here. Can anyone inform me of which wires go to which?

Bathroom ceiling heater isn't working. It's a nutone combo unit with the heater and fan each switched separately with receptacles part of the unit. Black wire to the working fan, red to the inop heater, common white. The heater works if I plug it into a wall outlet. I replaced the heater receptacle in the ceiling box - Still not working. With the breaker off, the heater switch read open both ways when switched. Compared it to the fan switch which read open/ short when switched.. Pulled the heater switch, it reads open/short when switched. Hmmm. Turned the breaker on, black to ground reads hot, black to red nothing, red to ground nothing. The red appears dedicated to switch the heater because there is only one red into the switch, not pigtailed to anything else and only one red coming into the ceiling box and it's a direct short between the two. What am I missing?