I agree with Dave on the light tube, they aren’t meant to be bright, but will allow enough light to see with the lights off, even at night if the moon is shining.
The second item looks like a HE gas furnace vent or a WH power vent termination.
I’ve never seen a bathroom vent terminated through PVC like that, although it’s a possibility. If it is a NG appliance vent, it appears to have inadequate clearance from the roof surface, clearance would be needed in the event of deep snow, the appliance will sense that the vent is blocked and will not turn on. I tried to click on your website but got an error message, so I’m not sure what climate zone you’re in.
I’m not sure how the photos uploaded. The pipe that looks like it’s for a high-efficiency furnace was the same pipe that you guys are saying is a light tube. Where the pipe is installed is in the corner of the house in a room with a mini split unit. we are in zone8