Temperature Compensation
Temperature compensation, battery voltage control points as the ambient temperature varies, so a solar light system should have a reference voltage that is temperature-controlled. For a single lead-acid battery is -3 ~ -7mV / ℃, we usually use -4mV / ℃.
Select 4 solar lamps light
At present, most lawn use LED as a light source, LED long life, up to 100,000 hours, low voltage, very suitable for use in solar lawn. In particular, LED technology has achieved its key breakthrough, and its characteristics are greatly improved in the past five years. At the same time cost performance has greatly improved. In addition, LED by the low voltage DC power supply, its low cost and light control, adjust the brightness, frequent switches are possible, and should not adversely affect the performance of the LED. Control the color, changing the distribution of light, resulting in dynamic mirage is possible, so it is particularly suitable for application in solar lawn. Many of its inherent characteristics, the use if attention will be adverse consequences. But the LED current sales in the market LED luminous efficiency can only reach 15Lm / W, can only achieve three-color color energy efficient lamps 1/3, the luminous efficiency three-color color energy efficient lamps can reach 50 Lm / W ~ 60Lm / W ??? Price-wise, the current production cost per Lm: the three-color color energy efficient lamps (with electronic ballasts) 0.022 yuan, 2002 f5mm white LED price of 1.9 to 3.0 yuan, the current high production costs per Lm, the price difference poor. From the point of view life, three-color color energy efficient lamps (with electronic ballasts) of life can reach 6000 hours, LED can reach more than 100,000 hours, on the surface, LED life is a three-color color energy efficient lamps (including electronic Ballast) a few times, but that is not true. Most current solar lawn lamp ultra bright white LED, its super bright white LED lumen maintenance at 20mA reach the initial intensity of 50% at a time (life) is less than 10,000 hours, Fudan University have demonstrated above-mentioned light source argument. This means that in many cases now is not the best solar LED lawn light, unless it is low-grade, the age of only 1 to 2 years of solar lawn, or less than 1w solar lawn. For more than 1W solar lawn, preferably using a three-color color energy efficient lamps. There are a number of solar lawn by 30 to 40 super bright white LED, input power 2W or more,
Different kinds of solar lights at: www.cn-solargardenlights.com
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