<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 fluorescent tube-backed changeable letters (cool).</div><div>/s/ Richard</div><div>_________</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jun 21, 2016 at 11:50 AM, Ray Gibson via Stagecraft <span dir="ltr"><<a href="mailto:stagecraft@theatrical.net" target="_blank">stagecraft@theatrical.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Jun 21, 2016 at 10:52 AM, Jerry Durand via Stagecraft <span dir="ltr"><<a href="mailto:stagecraft@theatrical.net" target="_blank">stagecraft@theatrical.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<blockquote type="cite">The new "white" LED street lighting which is
rapidly being retrofitted in cities throughout the country has two
problems, according to the AMA. The first is discomfort and glare.
Because LED light is so concentrated and has high blue content, it
can cause severe glare, resulting in pupillary constriction in the
eyes. Blue light scatters more in the human eye than the longer
wavelengths of yellow and red, and sufficient levels can <a href="http://www.sciencedirect.com/science/article/pii/S001448351400236X" target="_blank">damage the retina</a>. This can cause problems
seeing clearly for safe driving or walking at night.</blockquote></div></blockquote><div>I've always enjoyed the soft pink glow of the old streetlamps in the LA suburbs, which probably match what was around everywhere else. Are those sodium lamps?</div><div><br></div><div>I also remember that the streetlights in San Diego were an ugly orange color and they really bothered me.. What kind of lamps were those? I haven't been that way in a long time so maybe they're long gone but if I noticed this difference surely more experienced lighting professionals here would?</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>Ray</div><div><br></div></font></span></div></div></div>
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