Solar street lighting is generally adjusted by the current strength of power, built-in ordinary street lights are 12v or 24v voltage, solar street lights inside the controller are constant voltage, the voltage that is supplied to the lamps are 12v or 24v to save power, you can adjust the current intensity, for example, 12w solar street lights, through the voltage is 12v, by current is 1A, in order to allow the lamps to power saving, so that the lamp 6w output by adjusting the current to 0.5A allows the lamps 6w output, the course at this time lighting than when in 12w certainly dark. Also part of the solar garden lights with a surface light source (the high price of such a light source, the light fades small bright spot is the future garden lights light source development), built-in constant current source, current can not be adjusted so there is no half-power output, it can not adjust the brightness, only in accordance with its rated power output. Solar street lights do not need transmission lines, not consume electricity grid, roughly equivalent to one-time investment with conventional street light construction funds to use once inexhaustible wind energy and solar energy to provide reliable lighting, economic benefits. 1. Energy: solar photoelectric conversion electrical energy, inexhaustible, inexhaustible; environmental protection: no pollution, no noise, no radiation; 3 Safety: no electric shock, fire and other accidents; 4. Convenient : simple installation, no wired or "disembowelling" digging the construction, no blackouts brownouts concerns; 5 long life: high scientific and technological content of products, control systems and accessories are an international brand, intelligent design, reliable quality ; 6 high grade: technology products, green energy, and use of great importance to science and technology to improve the green image, they upgrade; 7. less investment: one-time investment, equivalent to AC (alternating current investment from the substation into the electrical control box, cables, from the project), an investment in the long term is good enough; 8. applies: solar energy, natural origin, a place where there is sunshine can be used, particularly suited to the greenbelt landscape lighting with high-end residential and outdoor lighting, the attractions coastal landscape lighting and embellishment, industrial development zones, industrial and mining enterprises street lights, major institutions outdoor lighting.