audioguru2
- Apr 6, 2004
- 12,026
- Joined
- Apr 6, 2004
- Messages
- 12,026
Hi Guys,
A local light bulb importer is re-calling millions of Chinese-made compact-flourescent light bulbs. Apparently, many are failing and although are properly made with fire-extingueshing plastic, they melt all over the place! Ouch if you're under one!
Adding to the problem is that the manufacturer used a counterfeit approval number so his product was never tested by the approval agency!
Shucks. I bought the same make a while ago but missed the "bad" dates by only 1 week. The importer is replacing them with two for each one returned. I need more anyway, I'll just have to buy them.
I had a European-made compact flourescent light bulb fail and fill the room with smoke. It lasted double its warranty period so its manufacturer wouldn't replace it. (He, he, I didn't tell them it was above my hot stove for many years.)
Have you noticed how hot those bulbs get? The elco's (haven't used that name for years) inside dry-up from the heat and the circuit goes BOOM!
I see why it is so difficult to dim the thingys. I think they "fire" each half-cycle so PWM of the mains like an ordinary dimmer would reduce the high voltage needed. I don't understand how the dimmable bulbs maintain the high voltage when dimmed. Maybe they just step-up the voltage high enough that they still fire, and the PWM from the dimmer just adjusts their duty-cycle.
A local light bulb importer is re-calling millions of Chinese-made compact-flourescent light bulbs. Apparently, many are failing and although are properly made with fire-extingueshing plastic, they melt all over the place! Ouch if you're under one!
Adding to the problem is that the manufacturer used a counterfeit approval number so his product was never tested by the approval agency!
Shucks. I bought the same make a while ago but missed the "bad" dates by only 1 week. The importer is replacing them with two for each one returned. I need more anyway, I'll just have to buy them.
I had a European-made compact flourescent light bulb fail and fill the room with smoke. It lasted double its warranty period so its manufacturer wouldn't replace it. (He, he, I didn't tell them it was above my hot stove for many years.)
Have you noticed how hot those bulbs get? The elco's (haven't used that name for years) inside dry-up from the heat and the circuit goes BOOM!
I see why it is so difficult to dim the thingys. I think they "fire" each half-cycle so PWM of the mains like an ordinary dimmer would reduce the high voltage needed. I don't understand how the dimmable bulbs maintain the high voltage when dimmed. Maybe they just step-up the voltage high enough that they still fire, and the PWM from the dimmer just adjusts their duty-cycle.
