Abstract: Fluorescent lamp assemblies with screw-in bases and solid-state ballasts, useful indoors or outdoors, such as in reflector spotlight or floodlight or table lighting. A two-piece non-conductive housing is retained simply by a pair of screws or the like, and laterally surrounds a fluorescent lamp assembly and its ballast, and also has a ratcheting screw-in Edison base on one end and a lens covering the light-emitting opposite end. Families of such lamp assemblies with different wattages and/or different beam-spreads are suitable for such usage, and for use in canister-like ceiling or wall fixtures.

Abstract: Dimming fluorescent lamp solid-state ballast. The ballast is adapted for automatic sensing and control of lamp temperature to dim the lamp to an optimal operating temperature, such as that at which the light output is a maximum per energy input. The ballast is also adapted for manual continuously adjustable or multi-position stepwise dimming control, which may include such an optimal setting. Other available dimming settings include undimmed or maximum light output, and/or the lamp's minimal sustainable light output.