§ 23.10. Description of Lamp Types.

This Section provides descriptions of types of lamps that may be useful in preparing, reviewing and approving proposed outdoor lighting plans:

(a)

Fluorescent lamps: Most fluorescent lamps are long and linear, making optical control difficult. Disadvantages include a tendency to produce glare. They have good color rendition, whitish appearance and superior life. Light output may be severely diminished by very cold weather. Fluorescent lamps are an excellent choice for low-level pedestrian lighting.

(b)

Incandescent lamps: Incandescent lamps have superior color rendition and a warm, white appearance. Disadvantages include short lamp life and high energy cost. An advantage is they are inexpensive. Not recommended for intermediate-level pedestrian lights.

(c)

Mercury vapor lamps: These lamps have excellent life but are not very energy efficient. They are strong in the blue-green end of the color spectrum but other than for foliage lighting they are not acceptable for color rendering properties. Not recommended for low-level landscape or intermediate-level pedestrian lights. May be appropriate for parking lot and roadway lights.

(d)

Metal halide lamps: These lamps offer superior optical control and color rendition and a white light source. May be appropriate for parking lot and roadway lights; appropriate for high-mast lights.

(e)

High-pressure sodium lamps. Efficiency drops when peripheral detection is important. They are low maintenance. The orange-yellow appearance and mediocre color rendition are disadvantages. Not recommended for low-level landscape lights or intermediate height pedestrian lights. Appropriate and preferred for parking lot and roadway lights and high-mast lights.

(f)

Low-pressure sodium lamps. These lamps have poor optical control but a superior life. Color rendering properties are very poor.