This is the discussion and article blog for LUMENPRIORIT.ORG
Anyone interested in the concept of Solid-State lighting products that incorporate controls to produce steady-state lumen production by regulating energy consumption, to realize a net savings in energy use, while improving lighting quality, should visit the site (see links).
We welcome all comments and contributions, and appreciate anyone willing to get involved.
LUMENPRIORITY.ORG is a not for profit entity for promoting the use of the unique attributes of solid-state lighting systems to advance energy conservation while simultaneously improving lighting system visual performance and quality. For more information visit the web site, or contact the organizer Kevin Willmorth (contact information is on the web site.)
“To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.” Albert Einstein
While your end goal “stable light delivery from day one to day end” is very commendable, why are you mandating the means to the end. It should be up to the manufacturers and their design engineers how to best achieve consistant lighting levels for the forcast lifetime of the product. If someone can build a better mousetrap and doesn’t need to start at half power levels then kudos to them. Don’t start out with a narror field of view, just the goal is adequate and let the competetors figure out their individual best ways to get there.
I am not mandating anything, as that is not my place, nor is it the intention here at all. It is simply an exploration of a concept, from the perspective of applied lighting design, that eliminates the need to initially over light a space to realize a down stream light level, while gaining the energy saved until the energy consumed by the system increases to maintain the desired end result light level. If someone can find a way to maintain 100% of initial light output for the life of a system without come form of current control, that would be cool. This would make the concept of lumen priority through control of power management to the LEDs irrelevant, including the tenants of this informational site, thus they would not have any reason to reference or consider its content. I’d also suggest that anyone who can actually invent a zero lumen loss lighting system, with no power management component, will have attained the equivalent of perpetual motion in lighting.
That said, since this site and blog were generated, the lumen degradation of LED devices has improved significantly. This means that baring an electronic failure, LED products can be designed to deliver over 100,000 reliable hours of light before degrading to 70%. In this case, the savings of energy is extended over a much longer period, thus saving even more in energy and money than with products of shorter lumen service life!