BULB Dear friends,
This is a postingabout electric bulbs and it’s development through years in the layman’slanguage. Now also we keep 10watts electric bulbs in our homes to replace the low wattage bulb provided insit out during night and for night lamps in rooms. If the LED bulbs providedfailed to function for immediate replacement ordinary/ LED bulbs are kept spare. Sincerely, Gopalakrishnan24-11-2021. 1. Introduction Size of bulb remains3/4th spherical and remaining conical in the holder side. While fitting two contacts provided in thebulb provide connection from the bulb to the holder. To switch on and switch off phase lead wire isextended through a switch. Initially shade wasprovided over the bulb, so that light might concentrate down wards. Graduallyuse of shade became reduced. It has become obsolete now. Bulbs had differentsizes. Higher wattage bulbs were bigger in size. Low wattage bulbs weresmaller. The bulbs were transparent, onecould see the filament, breakage of filament meant we had to replace the bulb. Though called Zerowatt bulb, it was 10 watts bulb used as night lamp. Night lamp had no shade 2. Installationof bulb The wiring wasextended to roof and to a ceiling holder at two or three places in hall and oneor two places in other rooms. Flexible wire was connected to ceiling holderopening cap and inserted through cap hole and was screwed. The flexible wirefor about 0.75 meter was connected to a bulb holder and bulb was connected tothe holder. Above the holder the shade was provided. 3. Commonuse of bulb. Initially 25 wattsbulbs were provided in bath rooms, 65 watts in hall and kitchen, and 45 wattsto other rooms. 100 watts produced more heat and light. People feared aboutmore electricity consumption. During functions, in the hall it was provided removing65 watts bulb. 4. Extendingelectric power to temporary kitchen for feasts. On those days inthe switch box for temporary use power sockets were provided. Flexible wire wasconnected to a plug, the other end a 100 watts bulb was provided through holder,and connected by temporary bindings, it was extended to temporary kitchen etc. by electrician. Plug point was handled very carefully. Why on those days aswitch control was not provided during wiring to socket point is a mystery to me. On those days we had only porcelainblack top tumbler switches. Piano switches came very late. Teak wood/countryswitch box was only there. To homes only single phase supply was given. Therewas limitation of total bulbs. Wiring was open on batten, later changed toconduits, now through conduits concealed through wall. No more tumblerswitches. 5. Mercurylamps Replacinghelium, mercury filled bulbs appeared.It gave more white light. Heating of filament was less, so the light wascomfortable. 6. Replacementto higher wattage bulbs Aftereyes got adjusted to 65 watts and higher watts 25 watts usage became low. 10watts bulb is still used for nightlamps. Progress in the field started. 7 Tube light Withthe arrival of tube lights, bulbs becamestand by. Tube lights may flicker suddenly, or go OFF. In kitchen, hall, bedrooms bulbs became stand by. Change ofwiring, slanting holder, tube lights were fitted to walls. Bulbs were fittedfrom slanting holder. Ceiling rose on RCC top became only for connectingceiling fans. 8 CFL Compactfluorescent light bulb (CFL) is a fluorescent light bulb that has beencompressed into the size of a standard-issue incandescent light bulb. CFLstarted appearing. Most of the bulbs were replaced with different wattage CFL. Bulbswere kept spare to replace not working CFL. CFL came with a warranty of oneyear. LED Bulbs Dueto poisonous effect of CFL, in place LED bulbs started appearing similar to oldbulbs in different sizes, with wattage of 10 watts, 15 watts etc. These bulbscome with warranty of one year. LEDbulb produces light by passing the electric current through a semiconductingmaterial—the diode—which then emits photons (light) through the principle ofelectroluminescence. Don't let that big word scare you! ... The electricalresistance of the filament causes it to get so hot that it glows, producinglight. Nowwe use for night lamps ordinary 10 watts bulbs in colour , most of the other lightingd using tube light,LED Bulbs are used in bathrooms, portico, outside lights etc. -- You received this message because you are subscribed to the Google Groups "Thatha_Patty" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/thatha_patty/1103120244.955386.1637728702906%40mail.yahoo.com.
