What effect does a bulb greater than 25 watts have in relation to heat?

A bulb greater than 25 watts creates additional heat due to its higher wattage, which leads to an increase in the temperature of the bulb itself. This expansion of metal components within the bulb towards the source of heat signifies a physical change in response to temperature differences. As the bulb heats up, it can become more susceptible to damage or failure if exposed to excessive heat from a nearby fire, as the materials can warp or deform.

The presence of a bulb emitting such heat is also a concern, making it potentially hazardous in the vicinity of flammable materials. This heightened temperature can indeed expand the bulb towards the fire, thereby increasing the risk of ignition and contributing to an overall fire hazard. Therefore, the dynamics of how materials respond to heat, particularly in the context of an elevated-wattage light source, are crucial to understanding the associated risks in fire investigation and prevention.