LED fixtures need drivers to convert AC to DC, lower voltage, and stabilize current. Drivers can enable dimming. They can be 40–50% of fixture cost. While LEDs last up to 100,000 hours, drivers last ~50,000 due to aging capacitors. High-end drivers use film caps but cost more. Focus on driver warranty for a better gauge of overall fixture longevity.
Building a custom controlled resistive load: a comprehensive guide to overcoming the limitations of commercial test devices for power supply testing using Raspbery PI and DIY electronic circuit design
This simple and inexpensive unit will help test various devices; with it, one can determine the power factor of the AC grid draw, power-on and power-off times, etc.
What characteristics are important? What do the characteristics mean? How to measure parameters cheaply?
