Skip to main content

Outdoor lighting

Commonly used outdoor lamps are metal halide (MH) and high pressure sodium (HPS). LEDs are also increasingly replacing them in outdoor applications, such as pedestrian path lighting. The quality of light differs among lamp types and is an important selection criteria considered with efficacy, efficiency, lamp life, and initial cost.

Match the light quality with a lamp type:

I. amber light II. white to bluish white light III. warm white
1. MH 2. HPS 3. LED (3000K)

A. 1=I, 2=II, 3=III
B. 1=III, 2=I, 3=II
C. 1=II, 2=III, 3=I
D. 1=II, 2=I, 3=III




D is correct.
Kelvin scale, at 2000K-4000K is warmer (yellowish), while 10000K becomes cool white or bluish.
are-review.blogspot.com

Comments

Post a Comment

Try These Too!

Bolted connections

What is the minimum spacing of bolts specified by AISC? and preferred spacing? A. 1 1/4 times the diameter of the bolt; 2 times preferred B. 1 3/4 times the diameter of the bolt; 2 1/4 times preferred C. 2 1/3 times the diameter of the bolt; 2 2/3 times preferred D. 2 2/3 times the diameter of the bolt; 3 times preferred E. 3 times the diameter of the bolt; 3.25 times preferred
Post a Comment
See the answer »

Roof pitch

Which one of the following slopes in this illustration corresponds with an 8:12 pitch roof? A. 45° B. 36.87° C. 33.69° D. 26.57°
Post a Comment
See the answer »

Building Efficiency

Convert the usable area of classrooms planned with medium efficiency level of new construction to the gross building area given the following model factors: Net Assignable Square Feet: 10,000, Space Factor: 1.5, Building Efficiency Ratio: 67%
6 comments
See the answer »