When buying a transformer, safety is paramount. High voltage can be lethal, and improper installation is a fire hazard.
If your sign is outdoors, you must purchase a transformer specifically rated for wet or damp locations. Where to Buy
Modern, lightweight, and silent. These are much smaller and easier to hide behind a sign. They often include safety features like auto-shutoff if the glass breaks, though they generally have a shorter lifespan than magnetic versions. Critical Safety Considerations