Led Light Bulb, Diode Eco Lamp, Lightbulb. Flat Vector Icon illustration. Simple black symbol on white background. Led Light Bulb, Diode Eco Lamp sign design template for web and mobile UI element. Led Light Bulb, Diode Eco Lamp, Lightbulb. Flat Vector Icon illustration. Simple black symbol on white background. Led Light Bulb, Diode Eco Lamp sign design template for web and mobile UI element.