Photodiodes; Yardsticks; Electronic LED signs; Illuminated exit signs; Illumination regulators; LED and HID light controls; Light emitting diode (LED) displays; Light emitting diodes (LEDs); Luminous signs; Neon signs; OLED (Organic light emitting diode) display panels; Organic light emitting diodes (OLED); Power adapters; Power supply connectors and adaptors for use with portable electronic devices; Road signs, luminous or mechanical