Controllable ballast and operating system utilizing same
Controlled light source
Controlled lighting device
Drive circuit of light emitting element
Eight electrode optical readout gap
Electric flash device
Electric flash device
Electric flash lamp unit with a light controlling circuit
Electronic ballast unit with integral light sensor and circuit
Electronic display dimming circuit
Electronic flash
Electronic flash apparatus
Electronic flash device
Electronic flash system
Electronic flash unit
Electronic flash unit with operational signal
Electronic flash with automatic duration control
Electronic photographic flash apparatus
Electronic strobe flash apparatus for indirect and direct flash
Exposure system