100+ Free IMSA Roadway Lighting II Practice Questions

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Question 1

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When performing a lighting design calculation using the lumen method, which formula determines the average maintained illuminance on a roadway?

Illuminance = Wattage / Area

Illuminance = (Lumens × CU × LLF) / Area

Illuminance = Voltage × Current

Illuminance = Candelas / Distance²

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2026 Statistics

Key Facts: IMSA Roadway Lighting II Exam

Exam Questions

IMSA

70%

Passing Score

IMSA

3 hrs

Exam Duration

IMSA

$500

Exam Fee (Members)

IMSA

~65-75%

First-Time Pass Rate

Industry estimate

3 years

Certification Validity

IMSA

The IMSA Roadway Lighting Technician Level II exam has 50 multiple-choice questions in 3 hours with a 70% passing score. Major topics: Advanced Lighting Design (25%), Advanced Electrical (20%), Smart Lighting (15%), Project Management (15%), Maintenance Programs (10%), High Mast & Specialty (10%), Environmental (5%). Requires Level I cert and 2 years experience.

Sample IMSA Roadway Lighting II Practice Questions

Try these sample questions to test your IMSA Roadway Lighting II exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1When performing a lighting design calculation using the lumen method, which formula determines the average maintained illuminance on a roadway?

A.Illuminance = Wattage / Area

B.Illuminance = (Lumens × CU × LLF) / Area

C.Illuminance = Voltage × Current

D.Illuminance = Candelas / Distance²

Explanation: The lumen method calculates average maintained illuminance as: E = (Lamp Lumens × Coefficient of Utilization × Light Loss Factor) / Area. The CU accounts for the percentage of lumens reaching the roadway, and the LLF accounts for depreciation from lamp aging and dirt accumulation. This is the fundamental calculation used in roadway lighting design.

2What is the 'Coefficient of Utilization' (CU) in roadway lighting design?

A.The percentage of electricity used by the lamp

B.The ratio of lumens reaching the roadway surface to the total lumens produced by the luminaire

C.The utility company's billing rate

D.The number of luminaires per circuit

Explanation: The Coefficient of Utilization (CU) represents the fraction of total luminaire lumens that actually reach the roadway surface. It depends on the luminaire's light distribution pattern, mounting height, pole setback, and road width. CU values are obtained from the luminaire manufacturer's photometric data and are typically between 0.2 and 0.5 for roadway applications.

3In photometric analysis, what does an isolux diagram show?

A.The electrical wiring layout

B.Lines of equal illuminance on the roadway surface, showing the light distribution pattern

C.The pole foundation details

D.The circuit breaker schedule

Explanation: An isolux (iso-illuminance) diagram shows contour lines of equal illuminance values on the roadway surface, similar to elevation contour lines on a topographic map. Each contour represents a specific footcandle or lux level. Isolux diagrams are used to verify that the lighting design meets minimum illuminance and uniformity requirements at all points on the roadway.

4What is the 'IES file' format used in roadway lighting design software?

A.An image file showing the luminaire photo

B.A standardized electronic file containing the luminaire's photometric data (candela distribution)

C.A warranty document

D.A maintenance schedule template

Explanation: An IES file (IESNA LM-63 format) is a standardized electronic data file containing the luminaire's candela distribution, efficacy, and other photometric data. Lighting design software imports IES files to perform point-by-point calculations and generate isolux diagrams. Each luminaire model has a unique IES file provided by the manufacturer based on photometric testing.

5What is an LED driver's 'constant current' operating mode?

A.The driver supplies a fixed voltage regardless of the LED load

B.The driver maintains a fixed current output (in milliamps) to the LED array regardless of voltage variations

C.The driver operates only at maximum brightness

D.The driver turns on and off at regular intervals

Explanation: A constant current LED driver maintains a fixed output current (specified in milliamps, such as 700mA or 1050mA) to the LED array. As the LED forward voltage changes with temperature, the driver adjusts its output voltage to maintain the specified current. This ensures consistent light output and protects the LEDs from overcurrent damage that would shorten their life.

6What is the difference between a DALI and a 0-10V dimming control system?

A.They are identical systems with different names

B.DALI is a digital protocol allowing individual addressing and bidirectional communication; 0-10V is an analog signal providing simple one-directional dimming

C.0-10V is more expensive and complex than DALI

D.DALI can only dim to 50% while 0-10V can dim to 0%

Explanation: DALI (Digital Addressable Lighting Interface) is a digital protocol that enables individual addressing of each luminaire and bidirectional communication (status feedback). 0-10V is a simpler analog control where a DC voltage signal (0V = off/minimum, 10V = full brightness) controls dimming but offers no feedback or individual addressing. DALI provides greater control flexibility but at higher cost.

7What is the primary advantage of DALI control in a roadway lighting management system?

A.It requires less wiring than any other system

B.Each luminaire can be individually addressed, monitored, and controlled, enabling fault reporting, dimming profiles, and energy optimization

C.It eliminates the need for power conductors

D.It only works with HPS lamps

Explanation: DALI's primary advantage is individual luminaire addressability with bidirectional communication. Each luminaire on the DALI bus can be independently controlled with specific dimming levels and schedules, and it reports its status (operating hours, faults, energy consumption) back to the management system. This enables predictive maintenance, precise energy management, and rapid fault identification.

8What is the maximum number of devices (drivers/ballasts) allowed on a single DALI bus?

A.16

B.32

C.64

D.256

Explanation: The DALI standard allows a maximum of 64 individually addressed devices (drivers or ballasts) on a single DALI bus. Additionally, up to 16 groups and 16 scenes can be configured. The 64-device limit is based on the bus power supply capacity and addressing scheme. Larger systems require multiple DALI buses connected through a DALI gateway or controller.

9How does 0-10V dimming control the light output of an LED luminaire?

A.By changing the color temperature

B.By varying a DC control voltage between 0V (minimum/off) and 10V (full brightness) on a separate control wire pair

C.By switching the luminaire on and off rapidly

D.By adjusting the frequency of the AC power

Explanation: In 0-10V dimming, a separate pair of control wires carries a DC voltage signal from 0V to 10V. The LED driver reads this voltage and adjusts its current output proportionally. At 10V, the driver outputs full rated current (maximum brightness). At 1V, the driver outputs minimum current. The control signal is analog and one-directional from the controller to the driver.

10What is the formula for calculating voltage drop in a single-phase AC circuit?

A.Vd = Power / Current

B.Vd = (2 × L × I × R) / 1000, where L is one-way distance in feet, I is current in amps, and R is resistance per 1000 feet

C.Vd = Voltage × Current

D.Vd = Watts / Volts

Explanation: Voltage drop for a single-phase circuit is calculated as Vd = (2 × L × I × R) / 1000. The factor of 2 accounts for both the outgoing and return conductors. L is the one-way distance in feet, I is the circuit current, and R is the conductor resistance per 1000 feet from NEC Chapter 9. This calculation is essential for sizing conductors on long roadway lighting circuits.

About the IMSA Roadway Lighting II Exam

The IMSA Roadway Lighting Technician Level II certification is the advanced roadway lighting credential. The exam covers advanced lighting design and photometric analysis, advanced electrical systems, smart lighting and networked controls, project management, advanced maintenance programs, high mast and specialty lighting, and environmental regulations. This certification builds upon Level I fundamentals and is designed for experienced lighting professionals.

Questions

50 scored questions

Time Limit

3 hours

Passing Score

70% correct

Exam Fee

$500 members / $525 non-members (IMSA)

IMSA Roadway Lighting II Exam Content Outline

25%

Advanced Lighting Design

Photometric analysis, lighting calculations, design software, and IES standards

20%

Advanced Electrical Systems

Advanced NEC requirements, power distribution, metering, and voltage drop calculations

15%

Smart Lighting and Controls

Networked lighting controls, dimming systems, sensors, and smart city integration

15%

Project Management

Project planning, specifications, bid documents, contract management, and budgeting

10%

Advanced Maintenance Programs

Preventive maintenance programs, asset management, group relamping, and lifecycle costing

10%

High Mast and Specialty Lighting

High mast design, lowering devices, tunnel lighting, and bridge lighting systems

Environmental and Regulatory

Dark sky compliance, light trespass, environmental regulations, and energy mandates

How to Pass the IMSA Roadway Lighting II Exam

What You Need to Know

Passing score: 70% correct
Exam length: 50 questions
Time limit: 3 hours
Exam fee: $500 members / $525 non-members

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

IMSA Roadway Lighting II Study Tips from Top Performers

1Master photometric analysis concepts including candela distribution, illuminance calculations, and uniformity ratios

2Study voltage drop calculations for long roadway lighting circuits and proper wire sizing

3Understand networked lighting control systems including DALI, 0-10V dimming, and wireless mesh protocols

4Know high mast lighting systems including lowering device types, inspection requirements, and ring configurations

5Review dark sky compliance requirements including BUG ratings, shielding, and light trespass mitigation

Frequently Asked Questions

What is the IMSA Roadway Lighting Technician Level II exam?

The IMSA RLT-II is the advanced roadway lighting certification. It has 50 multiple-choice questions in 3 hours covering advanced lighting design, photometric analysis, smart controls, project management, and high mast systems. A 70% score is required to pass.

What are the IMSA Roadway Lighting Level II prerequisites?

You need a current IMSA Roadway Lighting Technician Level I certification and 2 years of roadway lighting operation experience.

How hard is the IMSA Roadway Lighting Level II exam?

The exam is moderately challenging with a 65-75% first-time pass rate. It requires advanced knowledge of photometric analysis, smart lighting controls, and project management. Most candidates study 60-80 hours over 6-8 weeks.

What makes Level II different from Level I?

Level I covers fundamentals like basic electricity, luminaire components, and maintenance. Level II advances to photometric design calculations, networked smart controls, project management, high mast specialty systems, and environmental compliance.

Does Level II cover smart lighting technology?

Yes, smart lighting and controls make up about 15% of the exam. This includes networked lighting management systems, dimming profiles, occupancy and daylight sensors, and integration with smart city platforms.

What is photometric analysis?

Photometric analysis involves using lighting design software to calculate illuminance levels, uniformity ratios, and veiling luminance for roadway lighting layouts. Level II tests your ability to interpret photometric data and apply IES/AASHTO design criteria.

What career paths does Level II support?

Level II qualifies holders for senior lighting technician, lighting supervisor, and lighting program manager positions. It demonstrates advanced competency in design, smart systems, and project management for municipal and DOT agencies.