Stage laser lights can have varying lifespans depending on several factors such as the quality of the laser diodes, the usage patterns, and the maintenance practices. On average, high-quality laser diodes used in stage lighting equipment can last between 8,000 to 20,000 hours of active usage. However, it's important to note that laser lights require proper care and maintenance, including regular cleaning and cooling to ensure their longevity. Additionally, factors like power fluctuations, extreme temperatures, and excessive dust or dirt can impact the lifespan of stage laser lights. Therefore, it's crucial to follow manufacturer guidelines and take appropriate measures to maximise their lifespan.