a. Select suitable wattage based on customer’s system requirements and application methods. Must also take excess power and driving method into consideration.
· For selection key points when using MW power supply to “directly” drive LED lamp refer to LED configuration and installation notes.
· For selection key points when using MW power supply in combination with LED driver IC to achieve high precision current control refer to LED configuration and installation notes.

b. Based on LED power supply’s operating environment select suitable IP level and mechanical type (metal enclosure, plastic enclosure, and open frame PCB) for that environment.

c. Is PFC function required or not? Single stage PFC is only suitable for LED load. Dual stage PFC is suitable for general applications.

d. If LED system is based on direct drive, units with adjustable voltage and current should be considered for flexibility in changing voltage/current levels. Dimming function may also come in handy when LED brightness control is preferred.