Abstract: A clamp in one embodiment includes a flexible base; a bifurcation pivotal about one end of the base; a fastening member pivotal about the other end of the base and including pawls, an opposite projection, and a toothed section formed above; a universal member meshed with the toothed section; a seat rotatably secured to the universal member and adapted to releasably secure to a light; and a flexible ratchet pivotal about the other end of the base. Wrapping the ratchet around a seat post of bicycle by inserting it through the bifurcation and a space between the pawls and one end of the ratchet, pivoting the fastening member toward the seat until one pawl engages the ratchet and the fastening member presses on the base to urge against the seat post, and pivoting the bifurcation to press the bar onto the projection will fasten the seat post.

Abstract: A flashlight having its components securely coupled together is provided. Mounting an illumination member in an engagement member, attaching a connecting assembly to an illumination assembly by bending latches downwardly for allowing a ridge to engage with slots, and attaching the coupled connecting assembly and the illumination assembly to a battery compartment by engaging a flat with a bottom of a first wall to electrically couple the illumination assembly to the battery compartment, inserting a pin insert into a gap between second walls for positioning, engaging keys with transverse portions of L-shaped grooves, and rotating the illumination assembly about the battery compartment until the keys enter into vertical portions of the grooves will secure the above components together.

Abstract: A warning light of bicycle comprises a flashlight comprising a battery compartment including spaced, arcuate projections around a forward extension, a rear holed tab for connection to a lanyard, and a bottom slot; a cylindrical LED carrier assembly including rear contacts electrically interconnecting cells and LEDs; and a cylindrical head assembly including inner recesses engaged with $ projections by turning the head assembly a small angle about the battery compartment; and a clip assembly releasably secured around a tube component of the bicycle, an upper seat having two arcuate wings for clamping the battery compartment, a latch member inserted into the slot for fastening the flashlight, and a flexible tab adapted to press down to clear the latch member from the slot for disengaging the flashlight from the clip assembly.