Size: 600mm, 800mm, 1000mm or custom. LED Color: Red, yellow or white. Flashing frequency: 50±2/min. Solar panel: 15V/8W or custom. Battery: 12V/8Ah or custom. View More +. Solar Powered Traffic Sign Island Road. Reflective film: NOKIN Engineering grade or NOKIN diamond grade. Size: 600mm, 800mm, 1000mm or custom.