The Day Night venetian blinds my wife hates in our old Cougar. They tend to let little light beams in the camper especially in the bed room at night. My DW would hang black felt over the windows at night to prevent the little light beams from entering. The grand kids called the bedroom the BAT Cave. For the air vent in the roof of our sold Cougar; she would place a vent cushion in the roof opening and had me install a vent shade which was closed also.
She insisted on the Day Night Shade this time around in the Cedar Creek we just bought. I just hope these prevent the light from coming in during the night into the bedroom.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67