low voltage black tube, generally suitable for solar lawn, garden lights.

(2) low-pressure sodium: low-pressure sodium light high efficiency (up to 200Lm / w), but the inverter, low-pressure sodium lamp expensive, the whole system made high, with less.

(3) electrodeless lamp: low power, high luminous efficiency. The lamp in the 220V (pure sine wave, frequency 50 Hz) under normal conditions of use of electricity, life expectancy can reach 50,000 hours, the life of solar lamps greatly reduced and ordinary energy-saving lamps almost (because the solar lamps are square wave inverter , Solar power 220V output frequency, item bit, the voltage is not compared with ordinary electricity). In this case,
(4) LED: LED light source, long life, up to 1000000 hours, low operating voltage, no inverter, high luminous efficiency.

4.4.2 LED lamp characteristics
LED as a semiconductor light source, its strong momentum of development, solar street light is the most ideal light source, LED street light is a versatile, environmentally friendly energy-efficient street light source, suitable for lighting in a variety of occasions. Has the following characteristics:
(1) high luminous efficiency LED luminous efficiency of 50 to 200 lumens / watt, narrow spectrum, monochromatic, and almost all the light can be issued, and no direct color shade issue.
(2) high energy-saving With low voltage, low current, high brightness characteristics. A 10 to 12 watts of LED light source with a 35 to 150 watts of light energy emitted by incandescent lamp quite. The same lighting effects LED energy-saving 80% to 90% than traditional light sources. In this case,
(3) light color and more can choose white or color light, red, yellow, blue, green, yellow-green, orange-red and so on.
(4) high security LED light source using low voltage drive, light stable, non-polluting, no 50HZ strobe, no UV B-band, white color temperature 5000K, closest to the sun color temperature 5500K
(5) fast response LED LED response time is very short. Using a dedicated power supply to the LED light source power supply, the maximum illumination time of less than 10ms.