New posts

Reply to thread

Message

Myth #4: Halogen is an ultraviolet radiation (UV) hazard.
False and true, mostly false. A standard incandescent lamp emits about 75 micro watts per lumen(µW/lm) of UV, and unshielded halogen emits 100- 200 µW/lm. (Compare this to daylight, which emits 300 - 600 µW/lm!) However Underwriters Laboratories now requires halogen lamps and/or fixtures to incorporate a glass shield that brings the UV emissions down to a negligible level. For example, an MR16 with a cover glass takes over 30 times as long to emit the same amount of UV as an MR16 without a cover glass.

Lighting Design Lab Articles - Halogen Heat and Hype

http://www.conexpoconagg.com/Documents/ShowDeadlines/LVCC_Halogen_Light_Policy.pdf

http://www.nema.org/gov/env_conscious_design/lamps/upload/LSD%201%20T-H%20Lamps%20v2_4%202003%20C6.pdf

<blockquote data-quote="Cruizer" data-source="post: 1521395" data-attributes="member: 18088">Myth #4: Halogen&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; is an ultraviolet radiation (UV) hazard. &nbsp; &nbsp; &nbsp; &nbsp; False and true, mostly false. A standard incandescent lamp emits about&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 75 micro watts per lumen(µW/lm) of UV, and unshielded halogen emits&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 100- 200 µW/lm. (Compare this to daylight, which emits 300 - 600&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; µW/lm!) However Underwriters Laboratories now requires halogen lamps&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; and/or fixtures to incorporate a glass shield that brings the UV emissions&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; down to a negligible level. For example, an MR16 with a cover glass takes&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; over 30 times as long to emit the same amount of UV as an MR16 without&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; a cover glass.<a href="http://www.lightingdesignlab.com/articles/halogen/halogen.htm" target="_blank">Lighting Design Lab Articles - Halogen Heat and Hype</a><a href="http://www.conexpoconagg.com/Documents/ShowDeadlines/LVCC_Halogen_Light_Policy.pdf" target="_blank">http://www.conexpoconagg.com/Documents/ShowDeadlines/LVCC_Halogen_Light_Policy.pdf</a><a href="http://www.nema.org/gov/env_conscious_design/lamps/upload/LSD%201%20T-H%20Lamps%20v2_4%202003%20C6.pdf" target="_blank">http://www.nema.org/gov/env_conscious_design/lamps/upload/LSD%201%20T-H%20Lamps%20v2_4%202003%20C6.pdf</a></blockquote>

[QUOTE="Cruizer, post: 1521395, member: 18088"] [B]Myth #4: Halogen is an ultraviolet radiation (UV) hazard. [/B]False and true, mostly false. A standard incandescent lamp emits about 75 micro watts per lumen(µW/lm) of UV, and unshielded halogen emits 100- 200 µW/lm. (Compare this to daylight, which emits 300 - 600 µW/lm!) However Underwriters Laboratories now requires halogen lamps and/or fixtures to incorporate a [COLOR=red]glass shield[/COLOR] that brings the UV emissions down to a negligible level. For example, an MR16 with a cover glass takes over 30 times as long to emit the same amount of UV as an MR16 without a cover glass. [URL="http://www.lightingdesignlab.com/articles/halogen/halogen.htm"]Lighting Design Lab Articles - Halogen Heat and Hype[/URL] [URL]http://www.conexpoconagg.com/Documents/ShowDeadlines/LVCC_Halogen_Light_Policy.pdf[/URL] [URL="http://www.nema.org/gov/env_conscious_design/lamps/upload/LSD%201%20T-H%20Lamps%20v2_4%202003%20C6.pdf"]http://www.nema.org/gov/env_conscious_design/lamps/upload/LSD%201%20T-H%20Lamps%20v2_4%202003%20C6.pdf[/URL] [/QUOTE]