Why didn't get a wide range of universal solar street lamps?

Solar street lamps in the social environment of existing basically also has a lot of application scope, but the actual situation of the solar street lamps use till now, in a short period of time has not been widespread popularization, why didn't get a wide range of popular solar street lamps? Although such product is green and beautiful, to continuously improve the image of the city, but the whole looks very economic solar street lamps, their products get more promotion in theory, but it isn't so, what is the cause of the low penetration?

the reason one: solar energy street lamp brightness low

the brightness of the solar street light this year are basically rely on the power, and these panels conversion rate at about 20% power limitation, basically they can't for high power lighting, so the brightness of the solar street light compared with the ordinary street lamp brightness is lower.

the reason two: expensive solar street lamps

compared with other ordinary street lamp, solar street lamps which have more panels, and the battery and the controller, the cost price is definitely not very low, about twice as much as the ordinary street lamp, although said that they would all returned in five years, but actually in the process of actual use, many people still have bad feelings in this respect.

three reasons: solar energy street lamp lithium battery life short

the lithium battery life relatively solar street lamps, in the actual work time won't last too long, because the street light industry itself is made from a variety of different technology, about three years later will need to be replaced constantly, so the majority of the street lamp manufacturers are mostly have the warranty for these years, but in the end if the battery is broken, so solar street lights will certainly have a qualitative leap, although now the solar street lamps have a lot of restrictions, but they are not being hidden, in recent years, the street lights have been more popular, compared with developed countries domestic solar street lamps use still has certain gap.