TCLP compliant fluorescent lamp

Details TCLP compliant fluorescent lamp TCLP compliant fluorescent lamp

1996-05-31

1999-04-27

O'Shea, Sandra

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313639, 313565, H01J 6100

Patent

active

058982655

ABSTRACT:
A low pressure mercury vapor fluorescent lamp includes a lamp vessel having a mercury protective coating on the inner surface of the lamp envelope and a halophosphate phosphor layer. The lamp has a discharge sustaining filling including mercury and a rare gas. The level of mercury is selected such that the lamp has a standard average lamp life of about 20,000 hours while passing the Environmental Protection Agency's Toxicity Characteristic Leachate Procedure (TCLP) test and the State of California's Waste Extraction Test (WET).

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55 Federal Register 26986, Jun. 29, 1990, Environmental Protection Agency Identification and Listing of Hazardous Waste.
Chilcott, "Disposal Dilemma", LD+A, Oct. 1995, pp. 29-31.
"Measurement of Mercury Bound in the Glass Envelope During Operation of Fluorescent Lamps", by E.G. Thaler et al, J. Electrochem. Soc., vol. 142, No. 6, Jun. 1995, pp. 1968-1970.
SW846, Method 1311, Revision 0, Jul. 1992, "Toxicity Characteristic Leaching Procedure".
SW846, Method 7470A, Revision 1, Sep. 1994, "Mercury in Liquid Waste (Manual Cold-Vapor Technique)".
"A Study of Mercury Consumption In Fluorescent Lamps", 7th International Symposium on the Science and Technology of Light sources, by Tomioka, Higashi and Iwami (Jun. 1993), pp. 323-324.

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