[header] How to test fluorescent bulbs [title] Look for dark areas at the base of the bulb. [step] When bulbs age and have been used for a long time, brown spots will appear. If darkness begins to form at the ends of the tube, the bulb may be near its end.
[header] How to test fluorescent bulbs [title] Look for dark areas at the base of the bulb. [step] When bulbs age and have been used for a long time, brown spots will appear. If darkness begins to form at the ends of the tube, the bulb may be near its end.
Look for the phosphorescent lining along the outside of each bulb at the base. This is called " phosphorescent coating. While they may still light, they are wearing out and will die soon. [substeps] If the darkness only forms on one end of a tube light, flip the tube so the darkened end is on the opposite side of the fixture. [title] Identify or remove a covered bulb when it is on display. [step] Fluorescent bulbs that are attached to battery fixtures tend to have a covering or sticker on them that attaches the light to the light bulb. Examine the cap carefully and look for rings. [substeps] While fluorescent bulbs are not inherently dangerous, they can emit uva radiation that is dangerous to humans if ingested.