Sun unique limitations; fiber is too costly; market development is not enough; optical fiber can not be anti-UV and high temperature; structure is relatively complex. Limitations of solar energy is mainly reflected in the demand only collect sunlight during the day, greatly affected by climate, reaching very unstable; sunny day, the highest performance; must have a storage system for the evening and on cloudy days; energy production depends on the size of the area to collect sunlight; energy density is too low. The complexity of the constructed solar fiber optic lighting also can not enter the family of ordinary people. Solar fiber optic lighting a fatal flaw: solar energy only during the day, and used for general lighting at night, the solar fiber optic lighting is not superfluous? The answer to this question is actually to solve the solar storage solutions. I think there are three scenarios can achieve optical storage: Option One: optical storage exist emptied the external painted silver glass (mirror) ball. Option Two: light freezing for some time and then released. Option Three: solar energy into other forms of energy to be stored (such as energy, hydrogen energy, chemical energy, etc.). Start with Option One. This method is theoretically possible, but must ensure that the material is totally reflected; otherwise there will be attenuation of the energy of the light energy storage can not play role. However, this material does not exist in the real world, so this method is not feasible. Come talk Option II. Light frozen in the laboratory into a reality: According to the United States, "the Boston Globe reported, several scientists of Harvard University said recently that the experiment successfully light to stop light control in a space too After a period of time to let the light continues to spread. Their study, published in "Nature" magazine in December 2003. Unfortunately, the technology can only light pulse remains stationary with only a few percent of milliseconds, you want to practice is easier said than done, and you want to light the "frozen" live to consume a lot of energy, which more does not pay. Finally, said the program three. Option Three is the most feasible method. In my opinion, the solar energy into electrical energy is the most reasonable. Transformed into hydrogen, to solve the problem of catalyst, however, this technology now, and no big breakthrough, the energy conversion rate is too low. Current plants are solar energy converted into chemical energy, human society is yet to find the right light energy into chemical energy. Contrast energy is much more convenient, easy to use conversion rate is also relatively high.