Why do light bulbs grow brighter over time?

Light bulbs can appear to grow brighter over time due to several factors, primarily related to the filament in incandescent bulbs. As the filament ages, it can become thinner and more resistant, causing it to heat up more intensely and emit more light. Additionally, any accumulation of dust or residue on the bulb's surface can initially block some light, but when cleaned or burned off, the bulb may seem brighter. However, it's important to note that most bulbs will eventually dim as they near the end of their lifespan.