<html><head><style> body {height: 100%; color:#000000; font-size:12pt; font-family:times new roman,new york,times,serif;}</style></head><body><div><br></div><div>----- Richard Niederberg via Stagecraft <stagecraft@theatrical.net> wrote:<br>></div><div dir="ltr">> Dear Ray,<div>> The 'WARMER' monochromatic arc-bulbs are Sodium; the 'COOLER' monochromatic arc-bulbs are Mercury. I used both kinds on the same job a while ago, McCandless-style, to light a > Theatre's Parking lot. The Audience didn't know what hit them, but enjoyed the result while walking to and from their cars. The motivating light was a 'neon' fringed marquee (warm) with </div><div>> fluorescent tube-backed changeable letters (cool).</div><div>> /s/ Richard</div><br></div><div dir="ltr">A true pro --- Bravo ! As such, you hopefully checked on, and protected against, the possible UV content in the Mercury bulbs' output.<br></div><div dir="ltr">The mercury vapor house lights I'm familiar with had to be used in bounce style fixtures which shot the light against white ceiling tiles,<br></div><div dir="ltr">while sealing off any direct light from going down. These same bulbs were also pretty hard on gels.....<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div></body></html>