Zero Watt Night Bulb
Rs 20/Piece Get Latest Price
- Less maintenance
- Damage resistance
- Excellent usability
- Attractive pattern
- Simple design
|Watt||0.5 to 1 Watt|
Zero watt bulbs consume 12-15 watts of power. However, in older days, when all the appliances were turned off and only the zero watt bulb was kept on, the ‘not so sophisticated’ electromagnetic meter could not measure power of such less magnitude. The meter read ‘zero’ power and hence the name zero watt bulb. This misconception led to the unchecked usage of these bulbs.
Thus, ‘zero watt bulbs’ were called so not because of zero power consumption, but due to the inability of the older meters to accurately measure their power consumption.
How economic are these ‘Zero Watt Bulbs’?
Fortunately or unfortunately, the advanced meters these days ensure that even fraction of a power consumed by any appliance does not go unnoticed. This leads to high electricity bills for users who follow the above misconception. Lets take an example:
Power consumption of zero watt bulb: 15W.
Running hours: 24
Thus, units consumed per year will be (365*15*24)/1000 = 131.4 kWh.
Taking Rs 8 as per unit cost of electricity, the annual amount of bill will be: Rs. 1051.2
Multiply this by the number of bulbs used and you will realise that these bulbs may not be as economic as you may have assumed them to be.
A case study
In Kerala, there was an estimation that there are around 8lakh ‘zero watt bulb’ used by the state people. Since each of these bulbs consume 12-15 watts of power, the power consumption of the state increased by 9 Mega Watts (9*10,00,000 Watts). This proves that even though these bulbs consume negligible power, their unchecked use sums up to a huge power consumption or power wastage.
Zero Watt Bulbs used as Night lamps: Are they safe?
Light at Night (particularly falling on the retina) is one of the reasons for lack of proper sleep and other adverse health effects. According to Stephen Lockley, a Harward sleep researcher, dim lights of mere eight lux level (brightness exceeded by most table lamps and double that of a night light) can interfere with melatonin production. Melatonin is a hormone that is secreted and produced only at night. Melatonin is essential to the regulation of reproduction, body weight, and energy balance. It is also necessary for the synchronization of sleep and circadian rhythms. Also, it used to suppress the growth of cancerous tumors. Exposure to even dim lights affects the production of melatonin. To add to it, research shows that blue light has the most harmful effect with respect to the above case.
For small children afraid of darkness, a red night light should be used as it has least effect on melatonin production as compared to blue or white night lamps.
LED Alternatives for Zero Watt Bulbs
If you are still interested in going for zero watt bulbs, then there are several LED alternatives available in market these days. These LED alternatives consume just 1 W of power as compared to 15 W of the “Zero Watt” bulbs. Depending on the type, they cost between Rs 75 to Rs 150 a piece, and 14 W of saving can help recover the cost quickly. And LEDs being long lasting will keep it going for years. GM which is one of the popular brands has many models as shown below. Some of them also have a auto-sensing feature that makes it switch off the bulb automatically when there is enough light in the room and switch on when it is dark.