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L INEAR Fluorescent Base T ypes

L INEAR Fluorescent L AMP SHAPES

PHOSPHOR

Coating inside the bulb transforms ultraviolet radiation into visible light. Color of light produced depends on composition of phosphor.

LAMP Usually straight glass tube. May also be circular or U-shaped.

BASE

Several di erent types used to connect the lamp to the electric circuit and to support the lamp in the lampholder.

MERCURY A minute quantity of liquid mercury is placed in the bulb to furnish mercury vapor.

GAS Usually argon or a mixture of inert gasses at low pressure.

STEM PRESS The lead-in wires have an air tight seal here and are made of Dumet wire to assure about the same coe cient of expansion as the glass.

LEAD-IN WIRES Connect to the base pins and carry the current to and from the cathodes and the mercury arc.

CATHODE

“Hot cathodes” at each end of lamp are coated with emissive materials which emit electrons. Usually made of coiled-coil or single-coil tungsten wire.

EXHAUST TUBE Air is exhausted through this tube during manufacture and inert gas introduced into the bulb.

CATHODE GUARD For maximum lumen maintenance, a “cathode guard” surrounds each electrode to e ectively reduce lamp darkening and retain a clean appearance for thousands of hours.

Fluorescent L AMP COMPONENT S

Color Temperature Scale

Mini BiPin Medium BiPin Single Pin Recessed D.C. 4-Pin G10q

T5 T8 T12 U-Bent T9 Circular Circular 2C

G10q Base

9000

7500

6500 6500K DAYLIGHT PLUS™

4100K COOL WHITE

3000K WARM WHITE 2700K SOFT WHITE (Same as Incandescent)

5600

4500

3500

2500

KELVIN

8500

8000

7000

6000

5000

4000

3000

2000

1500

6500K

COLOR TEMP. KELVIN

APPROPRIATE APPLICATIONS

Restaurants Hotel lobbies Boutiques Libraries O ces Retail stores

Reception areas Showrooms Bookstores O ces

O ces Conference rooms Classrooms Hospitals Retail stores

Galleries Museums Jewelry stores Printing companies

5100K

3200K

3000K

5600K

Pets Plants People

5000K

Retail stores O ces Factories