Tony asks this question about fluorescent lamp tubes blackening at the ends very quickly from new. It has been answered by Lux Magazine’s Ray Molony (Theme – Lighting):
This Q & A is one of thousands posted in our Technical Expertise area, and answered on a daily basis by our Voltimum Experts.
Question: I have installed new fluorescent lights in my sitting room. However, after just one day, they are blackening at the ends. What is causing this?
Answer: Blackening at the ends is associated with a rapid switching cycle but this can't be the case if it's a new lamp.
If it's blackening already it's a faulty cathode and the lamp(s) should be returned to the manufacturer.
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