Which of the following devices distributes, filters, or transforms the light emitted from one or more lamps?

The correct answer is option 2):(Luminaire )

Concept:

• A luminaire is a device that distributes filters or transforms the light emitted from one or more lamps. 
• A luminaire or light fixture consists of the following components:

1. Lamps,
2. Lamp socket,
3. Ballasts,
4. Reflective material,
5. Lenses, refractors or louvers,
6. Housings 

• An ignitor is a starting device that generates voltage pulses to start a discharge lamp.
• A ballast is a type of electrical resistor or reactance, fixed in-line with the circuits that supply mains power to a light bulb
• Control Gear means components required to control the electrical operation of the lamp. Control gear may also include means for transforming the supply voltage, correcting the power factor and, either alone or in combination with a starting device, provide the necessary conditions for starting the lamp