PRODUCT RELIABILITY – Technical improvements to our lamps increase lamp weight

Ledzworld values the importance of the reliability of its products. The major factor that determines the lifetime of our products is heat. Junction temperature and the temperature of the drivers are the two major sources of heat inside every LED lamp.

Many companies claim high lifetimes of their lamps, often only based on the data of their LED suppliers. But if these LEDs are driven at too high a current, the heat will increase and lifetime will be reduced as a result. There is a linear relationship between lifetime and heat. So controlling the LED-junction temperature is extremely important. Our junction temperature is around 90-95 degrees C.

Secondly, we have to control the temperature of all individual driver components, and use the best components in terms of temperature resistance. The TCS, Thermal Compensation System, in our lamps, will shut down the power supply to the LEDs, in order to protect the lamps when ambient factors contribute to internal lamp temperatures that are too high for the LED lamps, so that they do not last as long as we claim in our specifications. We do however strive never to reach these temperatures.

During the last few months our R&D department has been working closely with component suppliers to generate a driver design that lasts as long as the LEDs. In order to remain in the safety zone we have decided to lower the temperature of our drivers by using a potting compound that was developed by a leading American chemical compound supplier.

This compound will reduce the temperature of our driver by 15-20 degrees C. The material will be put inside the connector that accommodates the driver. After it dries, it becomes hard, and forms a solid substance with excellent heat-dissipating properties.

The compound conducts the heat, which is generated by the individual components on the driver (PCB), directly to the outside wall of the connector.

Despite the substantially lower driver temperature, the heatsink wall of the lamps will not increase that much in heat, approximately 4-5 degrees maximum. As a result the lamps will become heavier. We believe that improved reliability is more important than the lamp weight. Please find the weight of our new lamps here.