Which ladder type is recommended for work at moderate heights, such as changing a light bulb?

A step ladder is recommended for work at moderate heights, such as changing a light bulb, because it is designed for stability and ease of use in such situations. Step ladders provide a secure, self-supporting structure that allows the user to reach higher areas safely without needing to lean against a wall or another structure. Their design typically includes a wide base and non-slip feet, which enhances safety while working at height.

In contrast, extension ladders are primarily used for reaching higher places requiring more vertical length and need to be leaned against a structure, which may not provide the same level of stability for shorter tasks. Multi-use ladders are versatile but may not offer the specialized stability of a step ladder for tasks at moderate heights. Scaffold ladders are designed for more extensive work sites and are best suited for tasks where multiple levels of work are required, making them less practical for straightforward tasks like changing a light bulb.