sirgoldalot wrote:30mm tube biggest bell end you can find lets more light in...myself mtc viper 56mm works nice lowest zoom at night...your not shooting long distance in the dark so it makes little difference
tube size is irelevent and only important for dialing,bigger the tube the more clicks ect
the human eye can only focus about 7mm of light,so if you had a 25mm and a 40 mm scope by the same manufacturer with the same mag ect the light would be the same.
it is the objective end that gathers light