A high-power light system includes a lamp for producing light within a designated wavelength range, a chiller for maintaining the lamp below a defined temperature threshold, and a control module for regulating operation of both the lamp and the chiller. The lamp includes a plurality of light emitting diodes (LEDs) arranged into independently-operable modules. In use, the control module selectively overdrives the LEDs to yield high-power light within the designated wavelength range. To prevent overheating within the lamp, the control module restricts the lamp to a pulse-based operational cycle, whereby each period of LED activation is of limited duration and is immediately followed by a period of deactivation at least three times as long in duration as the period of activation. Additionally, one or more temperature sensors are disposed within the lamp and enable the control module to temporarily suspend LED activation when measured temperature levels exceed the defined threshold.

A high-power light system includes a lamp for producing light within a designated wavelength range, a chiller for maintaining the lamp below a defined temperature threshold, and a control module for regulating operation of both the lamp and the chiller. The lamp includes a plurality of light emitting diodes (LEDs) arranged into independently-operable modules. In use, the control module selectively overdrives the LEDs to yield high-power light within the designated wavelength range. To prevent overheating within the lamp, the control module restricts the lamp to a pulse-based operational cycle, whereby each period of LED activation is of limited duration and is immediately followed by a period of deactivation at least three times as long in duration as the period of activation. Additionally, one or more temperature sensors are disposed within the lamp and enable the control module to temporarily suspend LED activation when measured temperature levels exceed the defined threshold.

This document describes systems and techniques that use a virtual temperature-sensor for active thermal-control of a lighting system having an array of LEDs. The system and techniques use a forward voltage across the array of LEDs as the virtual temperature-sensor, converting the forward voltage to a level that is detectable by an MCU of the lighting system. In response to determining that the forward voltage exceeds a threshold, the lighting system may reduce an amount of an electrical current provided to the array of LEDs to decrease the forward voltage and alleviate a thermal condition that may be detrimental to the array of LEDs, thereby maintaining luminance capabilities of the array of LEDs and prolonging life of the array of LEDs.

This document describes systems and techniques that use a virtual temperature-sensor for active thermal-control of a lighting system having an array of LEDs. The system and techniques use a forward voltage across the array of LEDs as the virtual temperature-sensor, converting the forward voltage to a level that is detectable by an MCU of the lighting system. In response to determining that the forward voltage exceeds a threshold, the lighting system may reduce an amount of an electrical current provided to the array of LEDs to decrease the forward voltage and alleviate a thermal condition that may be detrimental to the array of LEDs, thereby maintaining luminance capabilities of the array of LEDs and prolonging life of the array of LEDs.

An automotive lamp includes a temperature-sensing element having an electrical state that changes according to the temperature T of a semiconductor light source, and a constant current driver that generates a driving current I.sub.LED that corresponds to the temperature T. The maximum value of the temperature differential of the driving current I.sub.LED in a first temperature range from a reference temperature T.sub.0 to a first temperature T.sub.1 (T.sub.1>T.sub.0) is smaller than the maximum value of the temperature differential of the driving current I.sub.LED in a second temperature range from the first temperature T.sub.1 to a second temperature T.sub.2 (T.sub.2>T.sub.1).

An automotive lamp includes a temperature-sensing element having an electrical state that changes according to the temperature T of a semiconductor light source, and a constant current driver that generates a driving current I.sub.LED that corresponds to the temperature T. The maximum value of the temperature differential of the driving current I.sub.LED in a first temperature range from a reference temperature T.sub.0 to a first temperature T.sub.1 (T.sub.1>T.sub.0) is smaller than the maximum value of the temperature differential of the driving current I.sub.LED in a second temperature range from the first temperature T.sub.1 to a second temperature T.sub.2 (T.sub.2>T.sub.1).

Submersible lights including housings and a multilayer stack for pressure transfer are disclosed. A transparent pressure-bearing window, a window support structure, a circuit element populated with LEDs, and a pressure support structure may be mounted inside the housing. The support structure may be structured to bear at least some of the pressure applied to the transparent window from external pressure sources. The support structures may also be adapted to transfer thermal energy to an exterior environment such as sea water.

Submersible lights including housings and a multilayer stack for pressure transfer are disclosed. A transparent pressure-bearing window, a window support structure, a circuit element populated with LEDs, and a pressure support structure may be mounted inside the housing. The support structure may be structured to bear at least some of the pressure applied to the transparent window from external pressure sources. The support structures may also be adapted to transfer thermal energy to an exterior environment such as sea water.

A lighting device connects to an external power supply and includes a light emitting load and a secondary load. A temperature measurement is obtained related to a temperature of the external power supply. The secondary load is activated, thereby allowing the secondary load to be powered by the external power supply, when the temperature measurement is below a threshold. Thus, in cold conditions, an increased load is presented to the external power supply to assist start up of the external power supply in cold conditions.

A lighting device connects to an external power supply and includes a light emitting load and a secondary load. A temperature measurement is obtained related to a temperature of the external power supply. The secondary load is activated, thereby allowing the secondary load to be powered by the external power supply, when the temperature measurement is below a threshold. Thus, in cold conditions, an increased load is presented to the external power supply to assist start up of the external power supply in cold conditions.