Useful facts on the bulb

Now becoming more common economical light bulbs. But this familiar to us all the incandescent lamp is not going so easy to take positions, and certainly served humanity for a long time. And what do you know about incandescent bulb? If you read this, surely your knowledge about the light bulb to multiply. Tungsten - a real spender. 95% of the energy it uses for the heating coil. And only 5% goes to the production of light. heating, the tungsten filament in the bulb gradually evaporates. The metal is deposited on the glass. Therefore, the bulb of the old "grushek" much darker than the new ones. inside a glass bulb "lives" inert gas. Thanks to him, the thread is heated more strongly, and the metal surface with a spiral evaporates more slowly, thereby prolonging the life of the bulb. Spiral gives uneven lighting, while the human eye, accustomed to the sunlight, react to this 'stress' fatigue and deterioration of visual acuity. The most important technical characteristic of the lamp - power - is indicated on the bottom of the bulb (40, 60, 70, 100 watts). Near indicated allowable voltage (typically - 220-230 volts). If the voltage is below this, the light will shine not in full force and effect if the above - quickly burn out. To emit white (daylight) light source, it is necessary to heat the surface temperature of the Sun - 6000 ° C. The smaller degree, the less bright it becomes light. The lamp is warming up just prior to 2300-2900 degrees. That's why our windows at night flashing yellow light. Medium term light bulb - 1000 hours. In contrast, its sister halogen shine up to 4 thousand hours, and fluorescent live 12 000 hours. Mosquitoes, moths and butterflies are not flying into the light. The eyes of insects respond not to brightness, and the thermal radiation. They are attracted to hot glass. At dusk the same midges switch to tepid people. Every minute torturing the switch in order to save, we are bringing the death an "artificial sun". Helix can not withstand the torture by temperature and burst. A power lamp should not so much. It will have to shine a few days to catch up after working 10 minutes a washing machine.