Bicycle tail light

An adjustable, versatile-mounting bicycle tail light, comprising:

• a casing containing a battery and at least one LED light source, said one LED projecting red light through the casing in a rear direction from the casing,
• a universal mounting connected to the casing, enabling connection of the tail light to a bicycle luggage rack, chain stay, seat post or a bicycle rider's backpack or clothing, the universal mounting including a mounting base secured to the casing in a swivel connection about a pivot axis transverse to the casing as mounted on a bicycle and facing rear, allowing single-axis angular adjustment of the casing relative to the mounting base and thus adjustment of the aim of the LED up or down while projecting light in the rear direction,
• the universal mounting further including a bike mount with means for connection to a bicycle luggage rack, chain stay, seat post or a bicycle rider's backpack or clothing, the bike mount securable to the mounting base and quickly separable therefrom without tools, and
• the swivel connection of the mounting base and the casing being the sole swivel or pivoting feature of the bicycle tail light.