Don's bulbs
rare light bulbs and lamps
glossary of termsinformation
definition of: /OT

What is special name suffix "/OT"?

This special name encoding reference means: Opaque Top.

Top of bulb has been painted an opaque color to reduce heat and light output through top of bulb which improves efficiency of some bulbs; especially High Output projector bulbs.

references for this page: /OT, OPAQUE TOP