THIS IS?A PIC OF THE REVISED INSIDE PASSIVE CLIMATE LOGHTING SYSTEM FOR THE MOTOR HOME BUS HAS WINDOWS DOWN BOTH SIDES 40FT WORTH 3FTX5FT ..I HAVE SLIT WINDOWS CUT IN FOR TRAVEL PURPOSES AND ALSO VERY TIGJT SLITS IN THE REST OF WINDOWS ..IM GUESSONG BUT PROBABLY 2 To 4% LIGHT ALLOWED IN ..WITH...