Paterson「A」安全燈 - 僅燈罩（替換品）PTP765

The 4.5-inch diameter is exactly right for my bench setup, and the dome snaps on without any wobble. Replacing just the dome instead of the whole unit saved me a trip to the store, and the light output is just as even as the original.

The dome fits perfectly on my existing safelight base and the 4.5-inch size throws just enough light for my darkroom without fogging paper. A simple, solid replacement part that does exactly what it should.

Hung mine from the ceiling joist in the darkroom and it throws a nice even glow across the whole tray area without any hotspot. The 4.5" size is bigger than I pictured, which actually works better for the space.