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1953-54 Theatre Catalog, 11th Edition, Page 98 (64)

1953-54 Theatre Catalog, 11th Edition
1953-54 Theatre Catalog
1953-54 Theatre Catalog, 11th Edition, Page 98
Page 98

1953-54 Theatre Catalog, 11th Edition, Page 98

Dimming Fluorescent Lamps

Theatremen Can Now Make Better Use of the Economical Fluorescent Lamp Because of a Simple Dimming Control

BRIEF: It has long been. the desire on the part of lighting engineers to find a method for controlling the brightness of fluorescent lamps over a wide range . . . It is the purpose 0/ this article to describe a new system of brightness control which increases the many advantages of fluorescent lighting while retaining circuit simplicity and ease of installation.

Developed by the General Electric Company . . . this article was prepared by the men who developed this new system . . and gives a complete discourse on the technical problems involred . . . as well as discussing some of the new uses to which fluorescent latnns may

be put in theatres as a result of this new lighting achievement


The many advantages of fluorescent lamps have resulted in widespread acceptance of this light source. Until recently, however, it has been thought impractical to control the brightness of the lamp over a wide range. A new electronic control and ballast to dim fluorescent lamps has increased the llexibility of fluorescent lighting and has


General Electric Company

added a new tool for many applications. The new system provides the same smoothness of fluorescent brightness control as provided by dimmers for filament lamps.


Theatre owners and operators will be quick to utilize this new lighting tool. Because it is designed for the 40 watt fluorescent lamp, the complete line of colors can be used. The Deluxe Warm White (like filament lighting) and Deluxe Cool White (like natural daylight) are the best choices for the appearance of patrons and room finishes. The colored lampsered, gold, green, blue, pink* offer hundreds of combinations for

decorative effects in lobby foyer and auditorium. Interesting possibilities are afforded by the highly efficient black light fluorescent lamps, too.

The fact that all of these lamps can be dimmed over a 100 to one range suggests their use for combination intermission and running lights in the auditorium. For example, large luminous panels enclosing Deluxe Warm white, blue, and gold, lamps with recessed downlights between the panels could provide overall intermission lighting. For running lights, the Deluxe Warm white lamps could be dimmed out, leaving blue and gold on in the panels, and the downlights would be dimmed to a suitable level for safe circulation and comfortable seeing.

In the lobby a combination cove or ceile ing pattern using one row each of red, blue, gold, and green lamps could be arranged to give an attention getting play of colors. With the gold and green lamps

FLUORESCENT DIMMING SYSTEM four 40-well! lamps connected to experimental dimming :omrnl. Left

to right, R. T. Dorsey, Nela Park Theatre and Stage Lighting experteH. E. Schultz and I. H. Campbell of

the Discharge Lamp and Accessory Laboratory of Application Engineering where the dimming system

was developed. Experimental unit shown would control brightness 0! any number of tin-watt lamps up

to a total of eight. Another control unit slightly larger will operate any number 01 lamps up to a total of thirty-live. Both units will be available.

1953-54 Theatre Catalog, 11th Edition, Page 98