here ya go turtle comparison of light from a flashlight bouncing off pieces of cardboard. One is flat white and the other has a piece of mylar taped to it. and the winner is....................
harmonicminor Reviewed by harmonicminor on . side lighting and Mylar Hey Zandor In the faq section you are right about the reflectivity of mylar being better than white paint but....... yes a 1000 watt hps lamp puts out 140,000 lumens but not all of that goes to the sides. most goes down and probably a big percentage is lost to the hood. not to mention the floor and even grow pots can soak in a lot of those lumens like a sponge. in reality I would imagine maybe 30% of the lumens even hitting the sides. then after it reflects back much is lost Rating: 5