LED lighting — Reduce the power consumption and increase the users comfort

Abstract

With the vanishing of the fossil primary resources and the carbon impact issues, the efficient use of energy has become a major priority. Lighting is an important element of expenditure as it is easy to act on it. The Light Emitting Diode (LED) technology opens many perspectives in this field due to its higher energy efficiency. LED could indeed become in a near future a replacement for fluorescent tubes. LED's tubes have specific thermal and electrical needs; this work is focused therefore on optimization studies in terms of association topologies: serial versus parallel. The starting point is electrical equivalent models extracted from single LED. The choice of combinations is guided by the required performance in terms of light quality by paying attention to the overall consumption of the lighting system. The final target is the evaluation of losses reduction when the individual AC/DC conversion circuits integrated in the lamp bases are replaced by a DC/DC global distribution scheme. This approach was adopted to power the lighting of single room from a low DC voltage weakly regulated power grid.

Empirical BAC factors method application to two real case studies in South Italy

“…It is important to note that the definition of BF is antecedent to the spread of the more efficient LED technology [6] [12] [20]. Furthermore, it is clear that the use of more efficient light sources increases the relative weight of the control system' consumption on the total expenditure.…”

“…This happens, especially, when automation is combined with modern light sources such as Light Emitting Diodes (LED) that opens many perspectives in this field. Indeed, the application of these technologies can increase user comfort and energy efficiency [20]. For this reason, the replacement of the light sources with more efficient ones and the installation of the control system are very common actions in retrofitting existing buildings [21].…”

Challenges and benefits of LED retrofit projects: a case of SALIX financed secondary school in the UK

“…Kaip (2017) also demonstrates a 3.8 metric tonne saving in overall carbon by switching some buildings within Miami University to LED lighting. Mills and Jacobson (2013), Dupuis (2014) also present data arguing that LED lighting delivers significant environmental benefits. For example, as LED lighting lacks mercury, it makes recycling and disposal safer (Mills and Jacobson, 2013).…”

Bidirectional Grid-Tie Flyback Converter Applied to Distributed Power Generation and Street Lighting Integrated System

“…These kind of lamps use AC power, not allow dimming and require a high voltage pulse for their ignition. However, LED technology has become an attractive and widespread solution for SLS due to latest developments like increment of luminous flux, luminous efficacy and long useful life [12]- [17].…”