The University of Arizona


Risk Management and Safety

Frequently Asked Questions – Environmental Compliance

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Fluorescent & High Intensity Discharge Lamp Disposal


Question: What do the green end caps on a fluorescent lamp indicate?
Answer: The green end caps are used to identify lamps of recent manufacture with a reduced amount of Mercury. Lamps that have silver end caps have a higher Mercury content.


Question: Can I dispose of lamps from my laboratory/office?
Answer: It is best to have UA Facilities Management handle spent fluorescent lamps. FM staff have been trained to make the recycling or disposal determination for each type of lamp.