Power supplies can be categorized into external power supplies and internal power supplies based on their installation location.
(1) External Power Supply: As the name suggests, an external power supply is installed outside the light fixture. It typically uses higher voltages, posing a safety hazard to people. The difference from an internal power supply is that it has an outer casing. Common examples include streetlights.
(2) Internal Power Supply: This type of power supply is installed inside the light fixture. It generally uses lower voltages, from 12V to 24V, posing little safety risk to people. Common examples include LED bulbs.
