No, it is not possible to create a bulb or any other device that produces darkness as a form of output. Darkness is the absence of light, and it cannot be actively generated or emitted by a physical object. Light bulbs and other light-emitting devices work by producing electromagnetic radiation in the form of visible light, which illuminates the surrounding area.
Darkness occurs when there is an absence or reduction of light. It is the result of light being blocked, absorbed, or scattered by objects or substances in the environment. For example, when you turn off a light bulb, the room appears dark because the source of visible light is no longer emitting light waves that can be detected by our eyes.
While it is not possible to create a bulb that produces darkness, there are technologies such as blinds, curtains, or light-blocking materials that can effectively block or reduce the amount of light entering a space, creating a darker environment.