An aerator with an LED has: a case, a water fairing member and a throttle ring. The case further has a generator with a rotator. The water fairing member is disposed in the case through the inlet, the water fairing member has an annular slot facing the inlet of the case, a plurality of inlet apertures are disposed at a bottom of the annular slot. The water fairing member has a containment space facing the generator, and the containment space covers the rotator of the generator. The containment space has a plurality of outlet apertures, and the inlet apertures face a center of the water fairing member and helically connected to the outlet apertures. The inlet apertures taper towards the outlet apertures. The throttle ring is disposed in the annular slot of the water fairing member, and the throttle ring is adjacent to an inner edge of the annular slot.

Embodiments of the invention provide a pool cleaner receiving fluid flow from a pool hose, the pool cleaner comprising a supply mast configured for connection to a pool hose and directing fluid flow from the pool hose and a generator positioned within the pool cleaner. The pool cleaner further includes a paddle wheel coupled to the generator, the paddle wheel and the generator generating electric power using the fluid flow directed through the pool cleaner and control circuitry coupled to the generator, the control circuitry receiving the generated power from the generator for providing energy to operate at least one function of the swimming pool cleaner.

A buoy includes a flotation device configured to float at surface of a body of water. A vibrational linear electric generator (VLEG) is configured to generate power from vibrational oscillations caused by waves using compressed repulsive magnetic fields focused by end magnetic field deflecting magnets. A power collection circuit, which includes a first battery, is configured to collect and store energy generated by the VLEG. One or more electronic components are powered by the vibrational linear electric generator.

An outdoor light unit has plural self-contained mechanisms for producing electricity for powering the light unit, the light unit including a support, an electrical lamp, photovoltaic material at its top, an electrical generator, and water impingement blades and wind turbine blades to turn the generator to power the lamp. A rainwater collector collects rainwater running off of the photovoltaic material and directs it onto the water impingement blades. The generator and the rainwater collector are mounted to pivot with respect to the support, and fins cause the wind turbine blades to face into the wind.