light_level_mean_ = value;
else
light_level_mean_=(unsigned int) ( ((float) light_level_mean_) * 0.98 + ((float)value)*0.02 );
light_level_mean_ = value;
else
light_level_mean_=(unsigned int) ( ((float) light_level_mean_) * 0.98 + ((float)value)*0.02 );