exposure times for store bought emulsions w/out a vacuum uni

[GenePoole]

Howdy, I work in a textile shop, (uggh) and am starting to print my own posters at home. The buttholes I work for for some reason think I'll become competition if they help me in any way, and I cannot use the nice merc vapor exposure unit there. I will be using ulano qtx, tlx, or the store bought speedball baby emulsion to coat screens. Probably coating 2x each side and then expose using a 250 watt light witha photo flood. Amyone know the approximate times for a decent result that will have fine definitio, i.e. 65-l.p.i. range? Or hows about other light set ups/plans for the home and small budget. I need a little help in my plan for world domination, you see.