S smoothrx7 Member Joined 2005 2005-07-21 9:38 pm #1 2005-07-21 9:38 pm #1 Why do these two overhead projectors have different lumen ratings when they use the exact same bulb? Is it because of better quality optics?
Why do these two overhead projectors have different lumen ratings when they use the exact same bulb? Is it because of better quality optics?
