Examination Practice Questions And

Illinois Lighting Technician Certification Examination Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which type of lighting instrument is typically used for broad washes of

light?

• Fresnel
• Ellipsoidal Reflector Spot
• PAR Can
• LED Wash

LED Wash fixtures are designed to cover large areas with uniform light, making them ideal for broad washes.

• What is the primary function of a dimmer in stage lighting?
• Change color of lights 1 / 4

• Control beam shape
• Adjust light intensity
• Focus light

Dimmers regulate the electrical current to a lighting instrument, thereby controlling its brightness.

• Which color mixing method is used in most modern stage LED lighting?
• Subtractive
• Additive
• Complementary
• Analog

Additive color mixing combines red, green, and blue light to create various colors, standard in LED fixtures.

4. The unit “lux” measures:

• Electrical current
• Illuminance
• Power consumption
• Beam angle

Lux measures the amount of light falling on a surface per unit area.

• Which lighting instrument uses a lens and reflector to produce a

sharply focused beam?

• PAR Can
• Fresnel
• Ellipsoidal Reflector Spot (ERS) 2 / 4

• LED Panel

ERS fixtures use an ellipsoidal reflector and lens system to project a focused, controllable beam.

6. DMX512 is used to:

• Measure light intensity
• Control color temperature
• Control lighting instruments digitally
• Connect electrical circuits

DMX512 is a digital protocol for controlling stage lighting fixtures and effects.

• Which type of lamp produces light through a gas discharge process?
• Incandescent
• Fluorescent
• Halogen

D. LED

Fluorescent lamps produce light when an electric current excites mercury vapor, creating UV light that excites the phosphor coating.

8. In lighting design, “gobo” refers to:

• A type of dimmer
• A color filter
• A pattern or stencil inserted into a light fixture
• A control console

Gobos create shapes, patterns, or textures in projected light. 3 / 4

• Which of the following is considered a safety measure when handling

lighting instruments?

• Touching the bulb while hot
• Using frayed cables
• Wearing gloves and using proper rigging
• Ignoring load limits

Proper PPE and rigging prevent burns, electrical hazards, and accidents.

10. Color temperature of light is measured in:

• Lumens
• Kelvin
• Watts
• Candela

Kelvin measures the perceived warmth or coolness of a light source.

• Which fixture is most suitable for highlighting a small area with

sharp edges?

• Fresnel
• PAR Can
• Ellipsoidal Reflector Spot
• LED Strip

ERS allows precise shaping of the light beam for highlighting specific areas.

• / 4