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In 2016 Government of India launched 'Ujala LED bulb scheme' to lower India's carbon footprint and save electricity, it distributed 370 million LED bulbs free, by doing so as of March 2022, which resulted in saving of ₹ 200 billion (US$2.3 billion) of middle class and poor household power bill. The scheme is intended to replace all the ...
Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency.The distinction between efficacy and efficiency is not always carefully maintained in published sources, so it is not uncommon to see "efficiencies" expressed in lumens per watt, or "efficacies" expressed as a percentage.
The "warmer" light colors, such as a 2700 K incandescent bulb or a 1700 K candlelight, are more easily reproduced than more neutral white lights, such as 4800 K direct sunlight, and thus usually have higher CRI ratings in alternative light sources such as CFL and LED bulbs; "warmer" light (redder) naturally renders colors less accurately.
As of 2011, some LED bulbs provide up to 150 lm/W and even inexpensive low-end models typically exceed 50 lm/W, so that a 6-watt LED could achieve the same results as a standard 40-watt incandescent bulb.
When such phase-out programs began CFL and especially LED bulb prices were substantially higher than incandescent prices and made the up-front cost a barrier to entry to many consumers [161] despite the superior life-cycle cost of CFL and LED bulbs. [162]
India uses changes in the CPI to measure its rate of inflation. The WPI measures the price of a representative basket of wholesale goods. In India, this basket is composed of three groups: Primary Articles (22.62% of total weight), Fuel and Power (13.15%) and Manufactured Products (64.23%).