American Cinematographer - March 1990 - 14

Q# Is there a formula by

*
which I can determine
how many lighting fixtures, and
of what size, I can plug into an

electrical outlet without fear of

blowing fuses or breakers?

A# Yes,commit
and it's this
a good idea
*

to

one

to

memory, particularly if you're
doing any location lighting work:
watts
=

amps

volts
For example, a 1,000 watt
operating at 120 volts
draws 8.33 amps. (1,000 divided
by 120 equals 8.33.) Two 1,000
watt sources, drawing a total of
16.66 amps, could therefore be
operated from a typical 20 amp
source

line without fear of blowing a
fuse or breaker (again, assuming
a 120 volt line source).

While on the subject, a
pre-shoot survey of a location is
not complete without a thorough

^dedolight
A

Revolutionary Optical System

-

examination of the electrical

supply. If a room has five duplex

Surpasses Fresnel Technology

Innovative optical system design (pat. pend.) and precision manufac¬
turing define a new level of performance. A light output comparable
to conventional fixtures of much higher wattage. Economical 100, 50
and 20 watt 12 volt lamps are available - rugged and long-lasting.
Power by battery - camera or car (cigarette lighter). Or
use the AC contol unit, which can power up to four
lights, with accurate setting of the color temper¬
ature to 3000°, 3200° or 3400° Kelvin.

outlets, do not assume that it has
separate 15 or 20 amp breaker
for each one. More often, they
a

have been

spaced for

hooked up to a single line,
and the same line may be power¬
are

ing the overhead lights. Locate
the fuse

or

breaker box, and, if

practical, turn off each
succession to

-

Small size. Lots of
Lots of

-

-

-

tough.

even on

extraordinary focus range.
Really wide. 25 to 1 wide.

Canada

Denmark
France
Great Britain

Italy
Netherlands
Scandinavia

Spain
Switzerland

one
on

in

each

other floors. Examine the

receptacles for ground pins
(adaptors may be necessary).
Check switches to see if they
control any of the wall outlets.

edge to edge.

Soprofilm, 6 Av. G. Rodenbach, B-1030 Bruxelles
Cinequip, 10 Banigan Drive, Toronto Ont. M4H 1E9
Lome Lapham, 206-1099 West 8th Ave., Vancouver B.C. V6H 1C3
Macphon No. 2-2616 16th St. N.E., Calgary Abta. T2E 7J8
Poul Zimmermann, Borgergade 16, DK-1300 Copenhagen
Dimaphot, 16 Rue Clement-Marot, F-75008 Paris

what's

wall

A dream has come true.

Belgium

see

line. Keep in mind that each may
be feeding power to other rooms,

light.

An

A flat field. From

conven¬

ience, and in some occasions ALL

tel.

tel.
tel.

tel.
tel.
tel.

Telefex, 58 Kew Road, Richmond Surrey TW9 2PQ
De Sisti, via di Torrenova 257, 1-00133 Roma

tel.

Compact Light, Wenckebachweg 81, NL-1096 AL Amsterdam
Rune Ericson, Fluvudstagatan 12, S-17158 Solna

tel.

Rosco Espana, Pilar de Zaragoza 37, E-28028 Madrid
Bolex, 15 Route de Lausanne, CH-1401 Yverdon

tel.

(0)2-2425928
(416) 467-7700
(604) 738-5200
(403) 250-1719
(0)1-939750
(0)1-47.23.98.87

(0)1 19401155
tel. (0)6 6143500
tel.
tel.

(0)20-935807
(0)8-7340845

Make your examination as thor¬
ough as possible-it'll save you
hours of agony later.

Please send

questions to: American
Cinematographer, c/o Ask ASC, PO
Box 2230, Hollywood, CA 90078.

(0)1-24611 02
(0)24-216021

DEDOTEC USA INC.

DEDO WEIGERT
FILM GMBH

210 Westlake Drive

5, RottmannstraBe

Valhalla, NY 10595

D-8000 Munich 2

Tel.:

(914) 761-5608

West

FAX:

(914) 761-9501

Tel.:

Germany
(89) 525064

Tlx.: 529865
FAX

(89) 5291 73
v
American Cinematographer - March 1990

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