One-pound steel refillable cylinders can be used to fuel which of the following?

One-pound steel refillable cylinders are commonly used for fueling outdoor lanterns. These cylinders are designed to withstand high pressure and are suitable for applications that require portable and convenient fuel storage. In the context of outdoor lanterns, the small size of the one-pound cylinder is ideal for outdoor recreational use, such as camping or backyard gatherings, where a compact and lightweight fuel source is advantageous.

For other options, while they may involve LP-gas, they may require larger cylinders or specific types of refillable containers due to the higher fuel consumption demands or safety regulations associated with indoor heating units, automotive engines, and commercial refrigeration systems.