Is the power factor of some energy saver lamps so low that they actually consume more VA than incandescent lamps of equivalent light output? If a 100W incandescent is replaced by about a 20W CFL, as recommended by lamp manufacturers, that would imply PFs for the new lamps below 0.2. Admittedly we may wish to use higher wattages than this to get more light, perhaps to allow for some new lamps' greater fall of efficiency with aging.
At present the new lamp types are being sold to the public who buy them on the assumption that they can be used as plug-in replacements. Here in UK consumers have little choice, as the sale of GLS tungsten lamps is now banned, except for low wattages.
A quick look at Google suggests that fluorescent types might have PFs more like 0.5, but some LEDs may be very bad indeed. Are we heading for trouble with these latest types? It would be interesting to hear from anyone with real knowledge of the subject.
At present the new lamp types are being sold to the public who buy them on the assumption that they can be used as plug-in replacements. Here in UK consumers have little choice, as the sale of GLS tungsten lamps is now banned, except for low wattages.
A quick look at Google suggests that fluorescent types might have PFs more like 0.5, but some LEDs may be very bad indeed. Are we heading for trouble with these latest types? It would be interesting to hear from anyone with real knowledge of the subject.