Pranam Philips has brought in Tube-bulb fit in anywhere for power KR IRS On Wed, 24 Nov 2021 at 10:08, 'gopala krishnan' via Thatha_Patty < [email protected]> wrote:
> BULB > > Dear friends, > > This is a posting about electric bulbs and it’s development through years > in the layman’s language. > > Now also we keep 10 watts electric bulbs in our homes to replace the > low wattage bulb provided in sit out during night and for night lamps in > rooms. If the LED bulbs provided failed to function for immediate > replacement ordinary/ LED bulbs are kept spare. > > Sincerely, > > Gopalakrishnan 24-11-2021. > > 1. Introduction > > Size of bulb remains 3/4th spherical and remaining conical in the holder > side. While fitting two contacts provided in the bulb provide connection > from the bulb to the holder. To switch on and switch off phase lead wire > is extended through a switch. > > Initially shade was provided over the bulb, so that light might > concentrate down wards. Gradually use of shade became reduced. It has > become obsolete now. > > Bulbs had different sizes. Higher wattage bulbs were bigger in size. Low > wattage bulbs were smaller. The bulbs were transparent, one could see > the filament, breakage of filament meant we had to replace the bulb. > > Though called Zero watt bulb, it was 10 watts bulb used as night lamp. > Night lamp had no shade > > 2. Installation of bulb > > The wiring was extended to roof and to a ceiling holder at two or three > places in hall and one or two places in other rooms. Flexible wire was > connected to ceiling holder opening cap and inserted through cap hole and > was screwed. The flexible wire for about 0.75 meter was connected to a bulb > holder and bulb was connected to the holder. Above the holder the shade was > provided. > > 3. Common use of bulb. > > Initially 25 watts bulbs were provided in bath rooms, 65 watts in hall and > kitchen, and 45 watts to other rooms. 100 watts produced more heat and > light. People feared about more electricity consumption. During functions, > in the hall it was provided removing 65 watts bulb. > > 4. Extending electric power to temporary kitchen for feasts. > > On those days in the switch box for temporary use power sockets were > provided. Flexible wire was connected 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 a switch control was not > provided during wiring to socket point is a mystery to me. On those days > we had only porcelain black top tumbler switches. Piano switches came very > late. Teak wood/country switch box was only there. To homes only single > phase supply was given. There was limitation of total bulbs. Wiring was > open on batten, later changed to conduits, now through conduits concealed > through wall. No more tumbler switches. > > 5. Mercury lamps > > Replacing helium, mercury filled bulbs appeared. It gave more white > light. Heating of filament was less, so the light was comfortable. > > 6. Replacement to higher wattage bulbs > > After eyes got adjusted to 65 watts and higher watts 25 watts usage became > low. 10 watts bulb is still used for night lamps. Progress in the field > started. > > > 7 Tube light > > With the arrival of tube lights, bulbs became stand by. Tube lights may > flicker suddenly, or go OFF. In kitchen, hall, bed rooms bulbs became > stand by. Change of wiring, slanting holder, tube lights were fitted to > walls. Bulbs were fitted from slanting holder. Ceiling rose on RCC top > became only for connecting ceiling fans. > > 8 CFL > > Compact fluorescent light bulb (CFL) is a fluorescent light bulb that has > been compressed into the size of a standard-issue incandescent light bulb. CFL > started appearing. Most of the bulbs were replaced with different wattage > CFL. > > Bulbs were kept spare to replace not working CFL. CFL came with a warranty > of one year. > > LED Bulbs > > Due to poisonous effect of CFL, in place LED bulbs started appearing > similar to old bulbs in different sizes, with wattage of 10 watts, 15 watts > etc. These bulbs come with warranty of one year. > > LED bulb produces light by passing the electric current through a > semiconducting material—the diode—which then emits photons (light) through > the principle of electroluminescence. Don't let that big word scare you! > ... The electrical resistance of the filament causes it to get so hot that > it glows, producing light. > > Now we 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 > <https://groups.google.com/d/msgid/thatha_patty/1103120244.955386.1637728702906%40mail.yahoo.com?utm_medium=email&utm_source=footer> > . > -- 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]. 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