Greetings, We're working on a show that requires an exposed light bulb (regular 60-watt home use type bule) within the set to be conrolled from our lighting board. We're having difficulty because even when the dimmer is all the way down, there is a faint glow visible from the bulb when we are (should be) in complete blackout. I don't know what information is relevant but I'll share as much as I can. We use a 3-pin multiplex XLR system to control a portable dimmer pack from our board. The XLR cable run to the dimmer pack is fairly long (about 150-200 feet). Any ideas on why the bulb glows or what can be done to stop it? Thanks!