We've had a few of those, last one the bulb exploded and sent glass over three metres, the still flaming filament landed on a leather chair. The box it came in said "Quality Checked". Hope the new high efficiency ones don't go the same way.
Classic ordinary light bulbs are fused, usually both leads to the filament have fuses fitted. If you still have the lamp you would see the fuses welded into the wires on the inside of the glass filament holder.
So your 10A circuit breaker would not ber expected to trip as the lamp's overcurrent was over way to soon to trip a thermal breaker.
As for the lamp bulb jumping out of the base, was it a very old lamp?
Lots of thermal cycles possibly weakened the adhesove to the base.
As to failure mode of CFLs, I been using CFLs for a couple decades, and ones I see fail simply go out, or fail to start. Recently a matched pair of supermarket CFLs in the same light fitting quit within days of each othjer -- so I took the glass out of that ceiliung fitting to let the replacements run cooler.
I think CFLs suffer from the heat buildup inside some types of fittings.
In this instance, the power wires are intact from the filament, through the glass seal, and about halfway towards the base - then they vanish - both of them, at about the same point. I suppose the fuses could have been fitted there, explaining why the wires terminate abruptly. When whatever was there, be it ordinary wire, or fuse, evaporated, it would have increased the pressure in the space between the seal and the base, both through the evaporation, and heating of the air in there.
Well, falling out, given that this was in a typical lamp holder suspended from the ceiling.
No, it wasn't old at all.
Perhaps, though it was a living room light, so I wouldn't expect it to suffer high cycles before filament failure.
**I've heard about capacitor failures. I've never experienced any. I've been using CFLs for about 8 years. I presently have a couple of dozen around the place. All are Philips branded lamps, except four PAR38 CFL floods (which don't get used very much). Some are used from as little as 10 mins per day, to more than 4-5 hours per day. The two failures I've had were:
Possum sat/fell/brushed against one in the garage.
I installed one into a portable 'touble light' and dropped it. A rock penetrated the glass.
I am uncertain if an incandescent would have survived or not. I'm betting a definite maybe.
I don't much care for the colour temperature of the cheap brands, nor, it seems, their reliability. I've found the Philips lamps to have a pleasing colour temperature and have, thus far, been utterly reliable.
I've tended to opt for the higher colour temperature variants. OK, they look rather blue in comparison with incandescents, but in reality they are just a better white. One gets used to them, as well as having things look blue when they are, rather than black.
Well that's where the fuses were, I remember them as being encapsulated, but perhaps that's a feature on some brands only. This is something I explored a long time ago.
Yes, any electric fireworks usually gives at least a pop, sometimes a bang :) The fuse is only a section (about one cm or 1/2") of smaller gauge wire spot welded between the wire from the filament glass to the wire from the lamp base. Sometimes the fuse is encapsulated in a long glass envelope, I don't think your lamp had the encapsulated sort.
Funny, I visualised the lamp being closer to ground level, thinking it dropped a small distance. Dropping from the ceiling and no broken glass is more amazing.
Ah well, maybe the modern glues are less sticky? Long time since I saw an old globe go pop, CFLs fail without fanfare here.
Usually the tube fails, I have checked dozens of dead ones over the past few years. (Connect a normal tube to the terminals and it will work.)
Havent seen any electronics failures, but in our case they all have been operated inside ventilated equipment cabinets, the base to the bottom.
Others have had other experiences however, judging by stories and pics on some forums, though may have been used in hot areas, or sealed fittings with nil ventilation. Under these circumstances, I see no reason to doubt these reports considering some of the crap electronics around, and the common failure of electrolytics in most applications.
I recall hearing years back about a mirabella brand bulb "exploding" at switch on. It might have been on a consumer affairs program (that one on ABC years back probably), a current affairs type program or similar.
No details were given of the exact failure other than "big bang and bulb flew out of socket" or similar.
Another warning I read of a long time back was the use of certain incandescent (maybe QH or back reflected varieties of floodlight bulbs used) in shop window displays. They could shatter when they failed, dumping red hot filament pieces over clothing or other flammable display items beneath, starting a fire.
Well, not actually from ceiling height, because it was suspended. But I suspect that television saved the day, because the bounce off the rear housing probably caused the bulb to turn over so that it landed on its stem (which would be much stronger) rather than on the fragile spherical envelope.