Abstract: An exemplary light emitting diode (LED) streetlight apparatus includes a support, a light emitting module and a light guiding device. The light emitting module is mounted on the support for emitting light. The light emitting module has a first radiation angle in a plane perpendicular to the surface of the road, and the first radiation angle is equal to or less than 45 degrees. The light emitting module has a second radiation angle in a plane parallel to the surface of the road, and the second radiation angle is greater than the first radiation angle. The light emitted from the light emitting module is directed by the light guiding device to emit in a direction towards the surface of the road.

Abstract: A solar energy collecting device includes a photovoltaic module, a light reflecting unit, and a support unit. The photovoltaic module is configured to convert solar energy to electrical energy, and includes a front portion and a rear portion opposite to the front portion. The light reflecting unit is positioned below the photovoltaic module and has a concave curved surface opposite to the rear portion. The support unit supports the photovoltaic module.