DIY Metal Halide Vacuum Exposure Unit

Home made vacuum exposure unit with a 1000 watt metal halide bulb. Created using the formula for best exposure. Height from bulb being 1.5 times diagonal length of item being exposed.
This exposure unit has given me beautiful halftone results.
Here's the rundown of parts. (purchased from www.1000bulbs.com)
Ballast:
BV-V90D7811K Venture V90D7811K - 1000 Watt - Pulse Start - Metal Halide Ballast - 120/277 Volt
Mogul Socket:
SOCK-243200 Mogul Base Socket - 12 in. Lead - No. 14 AWG - 200 Deg. C - 600V - 4000V Pulse Rated - Used with Standard Metal Halide.
Bulb:
MH-100064351 SYLVANIA 64351 - 1000 Watt - BT37 - METALARC - Pulse Start - Metal Halide - Unprotected Arc Tube - 3800K - Mogul Base.
If you have a question feel free to ask. I'm a firm believer in a stupid question is a question not asked.
Purchased 3mm Neoprene from www.foamorder.c...