You often hear that with LED lamps you save a lot : but how much is this saving, concretely?
LED is a lighting technology that is spreading more and more, thanks to features such as greater durability over time and lower consumption , especially when compared to traditional light bulbs or even common energy-saving light bulbs.
In this article we try to investigate, with a concrete and empirical analysis, the difference in costs and consumption of the two technologies – traditional light bulbs and LED bulbs – to arrive at calculating this difference in quantitative terms.
A brief analysis
To really understand how much you save with the lamps and LEDs, let’s start with a specific example: suppose to calculate the expenditure needed to light up a medium-sized environment, taking as reference a hypothetical period of 5 years and a half: this period usually represents life average of an LED light bulb. The objective of this analysis is to compare the performance of an LED lamp with an energy-saving lamp , over the indicated period.
Let’s start from the analysis of costs : LED bulbs cost more than normal energy-saving lamps. If the latter cost around € 4 per bulb, LED lamps are at least expensive 22 €. However, the classic light bulbs last much less: if for 5 and a half years only one LED light bulb will be needed, the energy saving ones will need 6, which brings the total cost to 24 €. From a cost standpoint, therefore, compared to a higher initial investment, LED lamps over the long run cost less than traditional energy saving lamps.
Let’s now analyze the consumption : in a medium-sized environment like the one taken into consideration, an LED light bulb will use approximately 500 kW to illuminate it during the 5 and a half years considered; on the other hand, the energy saving lamp will consume at least 1,150 kW . In other words, the total bill costs are € 100 for LED lighting versus € 230 for traditional lighting .
Finally, if we make the sum of the costs and consumption, we get that, to illuminate a room for 5 and a half years, we will spend € 122 with a LED light bulb against € 254 with an energy-saving one.
At the end of the analysis, we have come to demonstrate in concrete terms what is the difference in costs incurred for the two types of lighting, with a distinct advantage in the use of LED lighting. If we add to this also that LED lights have a much lower environmental impact than energy-saving lights, we understand why this technology is spreading so quickly in the market.