Lamps for enhanced optical brightening and color preference

Abstract

In an embodiment, the disclosure provides a light source comprising at least one solid state light emitter. The light source, in operation, emits substantially white light having a Lighting Preference Index (LPI) of at least about 105, and this emission from the light source comprises a UV-violet flux of at least about 1%. Use of the lamps, light sources, and methods of the present disclosure may afford the ability to display linens and clothing under energy-efficient LED-based illumination, and may impart an effect to (especially white) clothing, that makes them look cleaner than under illumination by prior art LED lamps.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of previously co-pending co-owned International Application PCT / US2014 / 054868 filed September 9, 2014. This application also claims the benefit of commonly owned provisional application 61 / 896445, filed October 28, 2013, under 35 USC 119(e). These applications are incorporated herein by reference as if set forth in their entirety herein. technical field [0003] The present invention relates to lighting technology, and in particular to lamps and light sources based on light emitting diodes. Background technique [0004] Lamps and light sources for general lighting can take many forms. With regard to lighting used in retail environments (as well as for residential, hospital, hospital, educational, museum and commercial lighting, etc.), lamps or light sources with a high color rendering index (CRI) have historically been desired. Incandescent and halogen lamps have historica...

AI Technical Summary

Problems solved by technology

These historical light sources typically have fast warm-up and response times, high light output, and good color rendering or color preference characteristics, but may suffer from poor efficacy and relatively short lamp life

High intensity discharge (HID) lamps, and especially ceramic metal halide (CMH) lamps developed in more recent years can offer much higher efficiencies than historical lamp types, with high CRI, high color preference and higher beam Intensity, but may suffer from insufficient lamp life, poor color control over lifetime and from lamp to lamp, and higher cost

[0005] Although these existing technologies provide generally acceptable performance, there are many disadvantages in terms of performance, and / or color quality, and / or reduced manufacturing cost, and / or increased wall plug energy efficiency, and / or increased lamp life and reliability. Further enhancements of the

Images