Indoor and outdoor lighting will need AC-DC components to carry out the conversion of the AC and DC, but still need the assistance of the DC-DC LED light source to light, although the two types of components are very important, but the former must carry a high voltage of 110V or 220V , the entry threshold is more easy, the latter to enter the threshold is low, competition is more intense.
Indoor and outdoor LED lighting would prefer to use offline circuit, and generally depends on the size of the power and the applicable safety requirements. Buck converter in low-power applications, is not without isolation, is the need for separate but flyback converter. The external apparatus may need to isolate, because they must be able to moisture, to prevent the risk of electric shock.
Larger LED lighting, such as street aluminum flashlight, general power more than 50W, the isolated design will likely use a the secondary power structure, including front-end and back-end level. The front-end level will provide power factor correction, and the back-end level will provide isolation and regulate the current to drive the LED load.
Circuit design, outdoor and indoor lighting is not much difference, the main difference is that the operating temperature, about 85 degrees Celsius to 105 degrees, but if it is Japan, we may have up to 125 degrees, visible outdoor operating temperature requirements, its threshold is quite high. Outdoor portable lighting in addition to the special requirements of the operating temperature, the safety regulations on almost comparable with industrial grade, whether it is in the reliability and product life or to prevent Ray urgent, these are also the need to take into account in outdoor lighting.