lamp saver - increases the longevity of incandescent bulbs by switching them on at the zero-crossing point of the mains

lamp saver elektor september 1984 Most incandescent bulbs have an estimated lifespan of about a thousand hours of brightness. The actual time when the bulb blows is determined by the weakest link — the thinnest part of the filament. The most obvious way of increasing the filaments lifespan is to concentrate on the weak part, and in particular by limiting the peak current at switch-on as this is what causes the filament to burn out. Two versions of this zero-crossing switch have been designed and both are easily built into existing installations. lamp saver increases the longevity of incandescent bulbs by switching them on at the zero- crossing point of the mains About this time of the year home owners are forced to start thinking about making certain preparations for the winter, such as ordering fuel for the central heating. At the same time most people are likely to consider how to economise, and not only on the central heating bill. Lower wattage light bulbs are then used and ...