... light emitting diode (LED) based lighting devices. More particularly, the ... level while still reducing the power consumed from the AC power source ...
This invention relates to an emergency light unit of a size for plugging into a standard electrical wall outlet. The unit is self-contained and includes ...
In embodiments, the LED based light source may take the form of a standard light bulb that plugs into a standard lighting socket or fixture. Images (42) ...
The photoluminescent floor-level emergency exit lighting system may be ... illumination level of 1000 Lux. Test at 23°C. Figure imgf000020_0001. Test ...
... standard light fixture, the at least one LED-based light comprising: an emergency detector having a sensor operable to detect an emergency, wherein the ...
This used only younger test participants but increased the number of illuminance levels (0.2, 0.63, 2.0, 6.3, 20 lux) to enable the detection vs illuminance ...
To further increase the light levels of the LEDs 3 showing behind the pictogram sign 1, a printing process of perforated printing can be used (also known as ...
the power of the bar-shaped lamp 4 is adjusted to increases up to 26w, so as to ensure that the illuminance of the ground still remains at a level of 60 lux.
determining, using a sensor, a brightness level of light during operation of an LED-based lighting device; ... Emergency vehicle warning light. US3746918A ...
... LED technology while simultaneously utilizing existing standard bases in a standard lamp ... level of illumination for an area adjacent to an emergency vehicle.
The warning signal light provides various colored light signals for independent use or use by an emergency vehicle. These light signals may include a strobe ...
The embodiments disclosed herein relate to a light emitting diode (LED)-based light for replacing a fluorescent light in a standard fluorescent light fixture.
... light intensity to modify a standard lighting effect. The warning lights as ... level of illumination for an area adjacent to an emergency vehicle. The ...
The PWM duty cycle can be adjusted or varied by control circuitry (not shown) to maintain the power consumption of the LEDs 22 at safe levels. The DC power is ...
2 , light source 161 may replace a standard fluorescent tube light fixture. This can be accomplished by replacing the entire fixture, such that ballasts and ...