BRILUMD PRE-TEST

Front

Which metric most accurately quantifies a luminaire's energy-to-light conversion efficiency, directly impacting energy savings in large-scale installations?

Back

Luminous Efficacy

Front

Which specification best assesses a lighting product’s ability to faithfully reveal colors compared to a natural light source?

Back

CRI (Color Rendering Index)

Front

Larger Surface Mounted Diodes (SMDs) generally improve both luminous flux and thermal dissipation, optimizing efficiency and lifespan. TRUE or FALSE?

Back

TRUE

Front

What does the designation “50,000 hours @ L70” imply about an LED fixture’s photometric performance?

Back

It retains 70% of its initial lumen output at the 50,000-hour mark.

Front

Which statement correctly differentiates the photometric units: lumens, lux, and candela?

Back

Lumens = total visible light; Lux = lumens/m²; Candela = luminous intensity in a direction

Front

A higher CCT value directly correlates to better color accuracy and more natural light representation.

Back

FALSE

Front

LEDs emit directional light, making them suitable for focused lighting without needing external optics or reflectors.

Back

TRUE

Front

Which thermal management factor has the most significant influence on the operational longevity of an LED in extreme heat environments?

Back

Heatsink Design and Materials

Front

Modern LEDs does not exhibit instant-on behavior, requiring no warm-up period to reach full brightness.

Back

FALSE

Front

A luminaire’s beam angle is a crucial factor to consider when specifying floodlights for targeted area coverage.

Back

TRUE