LED lamp for dairy barns - design and thermal management

Investigations in this work are connected with the design and thermal management of LED lamp with spectral characteristics suitable for dairy barns. Spectral power distribution (SPD), optimal for dairy cows is achieved by combinations of LEDs with different spectral characteristics and the control of the LEDs' operation. The thermal management theoretical calculations and the heat sink choice are experimentally tested at various ambient conditions (air temperatures from 20°C to 45°C) and at different currents through the LEDs. Infrared thermography is used for evaluation of temperature distribution at the LEDs' solder points and the heat sink. Thermal management investigations allow the determination of safe operating conditions for the LEDs at various ambient conditions.