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Ken - What's more important than the type of light fixture used, is the wavelength of light given off by the bulb. Insects are attracted to the blue, violet, and UV end of the spectrum. They cannot see the red end of the spectrum, so yellow would be the next least visible to insects. The reason either high or low-pressure sodium vapor lights do not attract insects is because they give off copious amounts of yelllow-ish light. The insects barely notice the light is present. On the other hand, fluorescent and mercury vapor lights give off large amounts of UV light and are highly attractive to insects. Metal halide lights do not give off as much UV, but are also attractive. As far as LED's go, some give off light in the blue end of the spectrum and would therefore be attractive. It all depends on the LED. Tom Parker -----Original Message----- From: Ken Myers <[email protected]> To: pestlist <[email protected]> Sent: Wed, Apr 20, 2011 9:59 am Subject: [pestlist] architectural lighting question This is a message from the Museumpests List. To post to this list send it as an email to [email protected] To unsubscribe please look at the footer of this email. ----------------------------------------------------------- It has been my experience that lighting the exterior of a building with high-pressure sodium (HPS) lamps attracts far fewer insects in general to the façade (including of course all of its door openings, windows, cracks & crevices, nooks & crannies, etc.) than does the light from metal-halide (MH) fixtures. Of course this may vary by species, but in general I have found it to be a useful pest control measure to convert MH fixtures to HPS when possible. Does anybody have any experience or knowledge of how the new LED fixtures compare? Aside from all the other benefits such as reduced energy consumption, longer lamp life, better color rendition, etc., do they tend to attract more, or fewer, bugs than the other conventional types of lamps?? Ken Myers | Director of Operations & Capital Projects Valentine Richmond History Center 1015 East Clay Street | Richmond, VA 23219 (804) 649-0711 x320 (804) 643-3510 Fax http://www.richmondhistorycenter.com ---------------------------------------------------------------------- To send an email to the list, send your msg to [email protected] To unsubscribe from this list send an email to [email protected] and in the body put: "unsubscribe pestlist" NO quotes please. You are receiving the Pestlist emails in standard mode. To change to the DIGEST mode send an email to [email protected] with this command in the body: set mode digest pestlist Any problems email [email protected] ---------------------------------------------------------------------- To send an email to the list, send your msg to [email protected] To unsubscribe from this list send an email to [email protected] and in the subject put: "unsubscribe" - no quotes please. You are receiving the Pestlist emails in standard mode. To change to the DIGEST mode send an email to [email protected] with this command in the body: set mode digest pestlist Any problems email [email protected] or [email protected]
