NOVELTY - The device has a solar cell module (100) converting sunlight into power, and a light emitting module (800) for emitting light. A control module (500) measures amount of power transformed by the solar cell module. A switching module (600) switches the solar cell module into an OFF state when a minimum rechargeable value is greater than a set value. A turbine module (200) converts wind energy into power. The control module is electrically connected between the turbine module and the light emitting module.    USE - Light emitting member controlling device for a brace (claimed) installed in a road. Can also be used for a pillar of a traffic safety post, a sign pillar for a bicycle road guidance, a pillar of a bicycle safety indicator, a pillar of a safety indicator and a pillar of a back mirror, in an outdoor round, golf course, play facility or a shopping mall.    ADVANTAGE - The device accurately corresponds to weather and current day/night time of the region in which a pillar for a cover is installed. The device controls on/off operation of the light emitting module so as to improve visibility of the road at night time. The device is provided with a storage battery that can be charged to provide power in case of the poor day or the severe environmental generated wind, thus improving reliability of the device. The power produced from the solar cell and wind turbine is stored in the acquaintance storage battery, thus improving profitability as the relative products can be semi-permanently used as one installation. The device can be installed in the pillar of various posts, so that traffic accident can be prevented, thus increasing safety at the night time.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a light emitting member controlling method for a brace installed in a road    (2) a brace comprising a light-emitting device.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of a light emitting member controlling device.'(Drawing includes non-English language text)'    Solar cell module (100)    Turbine module (200)    Control module (500)    Switching module (600)    Light emitting module (800)