Question 1

What’s the maximum operating temperature of the LED chips and the temperature range of the power supply?

Accepted Answer

Maximum operating temperature of LED chips: The maximum operating temperature of LED chips is usually between 85°C and 105°C, depending on the type of LED and manufacturer specifications. Taking Lumileds LEDs as an example, their nominal operating temperature is -40 to 105°C.

Maximum operating temperature of LED power supplies: The maximum operating temperature of LED power supplies is generally between 60°C and 85°C. Different brands and models of LED power supplies may have different temperature specifications. Taking Inventronics EUM as an example, its nominal operating temperature is -40 to 80°C.

Question 2

What’s the case temperature of LED driver for safety and warranty?

Accepted Answer

By consulting the data, we can get the following data.

Operating Case Temperature for Safety Tc -40°C - +90°C, which means that it is allowed when the power supply case temperature is below 90°C.

Operating Case Temperature for Warranty Tc -40°C - +80°C, which means that when the power supply case temperature is below 80°C, it is allowed, and the power supply manufacturer will provide warranty in the event of failure.

By checking the curve Lifetime vs. Case Temperature, we can find that the lifetime of the power supply is greatly shortened when the temperature exceeds 80℃.

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Question 3

What is the difference between efficacy and efficiency of LED lights?

Accepted Answer

The efficiency of LED lights decreases as the temperature increases, resulting in fewer lumens being output. Due to this characteristic, LED lamps typically need a thermal management system to keep them within an optimal temperature range. Similar to how fluorescent and HID light sources require ballasts for operation, LED lights also necessitate drivers.

LM82, a standard used for measuring LED performance, provides data indicating that as the temperature rises, the light efficiency of the lamp decreases. Therefore, maintaining a suitable temperature is crucial to ensure that LED lights function at their optimal efficiency and produce the desired level of illumination.

Question 4

What’s the various temperatures of LED lamps?

Accepted Answer

The temperature of LED lamps involves four main aspects: the temperature of the LED chip, the temperature of the driver, the temperature of the housing and the ambient temperature. The following is an introduction to each temperature:

Temperature of the LED chip: The LED chip will generate heat when running, and its accumulation may cause the LED temperature to rise. Excessive temperature may affect the life and performance of the LED.

Temperature of the lamp shell: The temperature of the LED lamp shell refers to the temperature of the outer surface of the lamp. This temperature is usually only for reference, but generally, the higher the surface temperature of the housing, the temperature of the LED lamp beads and driver will also increase, so suppliers will also pay attention to this temperature.

Temperature of LED driver: LED driver also generates heat when working, but its energy proportion is relatively small. Therefore, the temperature of the LED driver is generally lower than that of the LED lamp bead.

Ambient temperature: Ambient temperature will also affect the operating temperature of LED lamps. In a high-temperature environment, the heat dissipation effect of LED lamps may be affected, so it is necessary to observe the performance of the lamps under high temperatures.

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Working temperature of LEDs and LED driver – electric street light

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LED Street Light

Solar Street Light

Led Flood Light

Solar Flood Light

LED High Bay Light

High Mast Light

LED Traffic Light

LED Tunnel Light

LED Garden Light

LED Canopy Light

Led Bollard Light

Lighting Accessories

Smart Systems

Simulation Design

Smart Financing