LED SMD Bulb (R Series), are reflector shape LED bulb which is suitable for certain medical equipment lighting, and they are also used in residential or commercial lighting. R series LED bulb are wildly use in home lighting and shop lighting. Power rating of R series LED ranges from 4 watt to 20 watts, which the size of R series is also different. From small to large, there are R39, R50, R63, R80, R95 and even R120 bulb light. LED bulb could use Edison screw base of different sizes. The most common includes E14 and E27 bases. For US market, E12 and E26 are used. If it is Australia and UK markets, bayonet base B15d and B22d are used. R shape LED bulb are usually used in home lighting fixture, office ceiling light and clinical lighting fixtures.