The U.S. Department of Energy (DOE) published the first of four new surveys that develop the conclusions of a report published last year. This new report, as well as the former, focus on what is called the LED PAR38 lamps that are, in reality, a common form used in LED spotlight. The new results suggest that most LED products compare favourably with the halogens on most of the criteria considered, with however some reserves.
The results of the report
LED spotlights using a single transmitter design (Mono Led high power) are usually preferred for the quality of their beam and the quality of the shadow, on the criterion of color quality, they don’t always correspond to the same index of color rendering of the product cry than Halogen products.
Remember: the subjective perceptions of the quality of a color of an LED light can be different than his IRC rating.
What does this means?
Perhaps the cry is not the ideal data to measure the perception of color LED.
• the LED spotlight with narrow beams were generally regarded as having a less interesting beam quality, the Led spotlight with beam wide are more effective, although there is a substantial variation in the quality seen in any of the groups.
• For color quality, observers prefer usually 3000 K (a white very slightly colder) to LED lamps more than 2700 K (warm white) LED lamps according to HEALTHINCLUDE.COM.
Although most PAR38 LED lamps were classified more than halogen criteria, there are still improvements, similarly for the most efficient lamps.
In addition, there is still a wide disparity between PAR38 LED lamps – as has also been observed in halogen lamps – which will require buyers to make purchases more precise.