Methods and apparatus for controlled lighting based on a reference color gamut that is shared amongst multiple lighting units. A reference color gamut may be determined for multiple lighting units based on spectral power distributions associated with the lighting units. Variable color light or variable color temperature white light subsequently may be generated consistently and predictably amongst multiple lighting units that are each controlled based on the reference color gamut. Lighting comma...

An apparatus for illumination generating artificial light which resembles natural light as much as possible comprises a light source radiating substantially in the blue-green region, such as a fluorescent lamp (16a,b,c,d) and at least one incandescent lamp (18). Prior to exiting from a housing (12) of the illumination equipment the light of the light source radiating blue-green is reflected at least once from a white wall (14). This applies also, in part at least, to the light of the incandescen...

A blood tracking system includes a light source having a first LED configured to emit light of a first color and a second LED configured to emit light of a second color. The light of the first color and the light of the second color are mixed to produce light of a third color when the first LED and the second LED are activated. The light of the third color highlights blood.

A system of at least three multi-colored LED's has an optimized color rendering index by proper selection of the wavelengths of each LED, such system being useful for general illumination purposes.

An indicator unit for use at the edge of airfield runways which produces a split beam of light, the interface of which may be adjusted to the required angle of flight path to guide incoming aircraft, the indicator unit comprising a support assembly having mounted therein at least two projection tubes, each projection tube housing a removable pre-aligned projector having a light source, a red-passing filter and a divergent lens disposed to produce the split beam of light.

The invention relates to a luminaire comprising a plurality of light sources fixedly located in a plurality of positions and comprising at least an electroluminescent diode. Said sources are focused by the same optical system fixed relative to the plurality of sources. Said luminaire comprises electronic means for dimming sources in their emission intensity independently of one another and as a function of their respective positions relative to said optical system. The invention provides an outp...

The excipient comprises hydroxy alkyl cellulose or hydroxy alkyl alkyl cellulose, wherein the average number of substituted moles of hydroxy group in glucose per anhydrous glucose unit is from 0.1 to 1.30; the average number of substituted moles of hydroxyalkyl groups per anhydrous glucose unit is from 0.05 to 1.00; and the average number of substituted moles of alkyl groups per anhydrous glucose unit is from 0 to 1.00. When the excipient is mixed with a medicament and the resultant mixture is c...

In addition to the effect of harmonized illumination and increased heat radiation, a LED illumination lamp provides an improved effect of hermetic seal, anti-vibration and waterproofing between components and assures prolonged life span. The illumination lamp comprises a body adapted to be placed on or around a target illumination object, a LED module lying inside the body and a cover mounted on a seat part of the body. The LED module has a printed circuit board affixed to the body and a group o...

The present invention provides a light emitting diode lamp, which includes at least a light emitting diode and a control circuit. The light emitting diode lamp has an anode pin, a cathode pin, and a synchronous pin. The anode pin and the cathode pin receive a DC voltage, and the synchronous pin is connected to the control circuit. Moreover, the present invention provides a synchronous light emitting diode lamp string, which includes a plurality of light emitting diode lamps and at least a power ...

A LED module having a plurality of LEDs, comprising mixed-light LEDs and additional LEDs, wherein each of the additional LEDs (2) has a plurality of LED chips (6, 7, 8) having different emission wavelengths, which, in each instance, are arranged in a common housing.