In a totally dark room, where no external sources of light are present, it would be challenging to determine if an object is emitting its own light without using your eyes to directly or indirectly observe it. Our primary means of perceiving light is through our visual system, which relies on the detection of photons by the photoreceptor cells in our eyes.
If you are explicitly excluding any form of direct or indirect observation, it becomes exceedingly difficult to make such a determination. Other senses, such as touch, hearing, or smell, are not typically involved in perceiving light emission. Without using any form of detection or observation, it would be nearly impossible to differentiate between an object that emits light and one that doesn't.
However, if you allow for indirect means of detection, there are alternative methods to perceive light emission. For example, you could employ light-detecting devices or sensors, such as photodiodes or light meters, to detect the presence of light in the room. These devices can register the intensity or wavelength of light emitted by an object, even if you are not directly looking at it.
In summary, in a completely dark room without any form of direct or indirect observation, it would be challenging to ascertain if an object is emitting its own light. However, if indirect detection methods are allowed, it becomes possible to measure light emissions using specialized devices.