(6) S (Straight Side) Type Bulb (Code: S)
- “S” means Straight Side.
- Nomenclature:
- Numbers in each code refer to the bulb’s diameter in one-eighths of an inch.
- S20 bulb: 20/8 = 2-1/2″ diameter
- Lighting direction: Uni direction.
- Bulb Technology: incandescent , LED, tungsten-halogen, CFL
- Application:
- S type miniature light bulbs are found in many applications including: indicator, auto stop and turn signal lights, scientific and medical instruments, microscopes and aircraft.
(7) T (Tubular) Type Bulb (Code: T)
- T means “Tubular”.
- It is known as “T” type because it has a shape of cylindrical Tube.
- (T )Tubular type light bulb is available in wide bulb technology like Incandescent, Linear fluorescent, HID and LED.
- T light bulbs have very different applications according to its shape.
- Incandescent T6 light bulbs are used in exit and stairway signs and picture lights.
- Linear fluorescent T12, T10, T8, and T5 light bulbs come in a variety of lengths, ranging from 2 to 8 feet. These light bulbs are used for general lighting in offices, retail outlets, hospitals, and parking garages.
- High intensity discharge light bulbs also come in T shapes, including T9 and T15. These light bulbs are used in sports arenas, billboard signage, and industrial applications.
- Tube Type bulbs are available in different shape like
- Linear Tube Light Shape:
- T12, T8 and T5 are naming convention for tube lights where “12” is the thickest and “5” is the slimmest tube light.
- U-Bend :
- U-Bend Tube light bulbs T8 is created by bending a 4-foot length T light bulb into a U shape in order to reduce the maximum overall length of the light bulb. This is desirable in some locations that have limited space. By bending a 4-foot light bulb into a U configuration that is comparable to a 2 foot light bulb in length, the end user will receive double the light output in the smaller space. This light bulb is used in offices, hospitals, and retail applications.
- Spiral Shape:
- The spiral light bulb is the shape of a compact fluorescent light bulb. A smaller diameter fluorescent T light bulb, such as T4, T3, T2, or T1, is twisted into a spiral or coil configuration in order to provide the most amount of light output in the least amount of space.
- Spiral light bulbs are typically used to replace incandescent light bulbs and can be used virtually anywhere, including residential, commercial, retail, hospitality, and restaurant applications.
- Nomenclature: T4, T8.
- Numbers in each code refer to the bulb’s diameter in one-eighths of an inch.
- T8 bulb: 8/8 = 1″ diameter
- Lighting direction: illuminates its light in Omni direction.
- Bulb Technology: Incandescent, CFL, High Intension Discharge Lamps, Metal Halide Lamp, Sodium Discharge, Mercury Vapor Lamp and LED.
- Applications:
- Depending on their size, these bulbs can be used in applications ranging from chandeliers, wall sconces, and pendant lights to basement and garage light fixtures.
- Exhibition hall, showing and advertising board
- Industry plant, workshop, warehouse
- Sports lighting, stadium, gymnasium and car parking area
- Flood lighting for tunnel, port, viaduct, Public Square and construction site etc.
(8) Double Ended Type Bulb (Code: T3)
- It is “T” Type cylindrical Tube Blub having a both end connection.
- Double ended Bulb (T3) is installed in horizontal position.
- These light bulbs are a cost-effective alternative to standard light bulbs and a completely dimmable in multiple lighting applications
- Nomenclature:
- Numbers in each code refer to the bulb’s diameter in one-eighths of an inch.
- T3 bulb: 3/8 = 0.3″ diameter
- Lighting direction: illuminates in Omni direction.
- Bulb Technology: Incandescent, Metal Halide, halogen, LED.
- Application:
- Mostly used in commercial lighting, ambient lighting and flood lighting.
- It can be horizontally installed. With a compact size it provides a uniform lighting for a large area.
(9) PS (Pear shape) Type Bulbs (Code: PS)
- PS means “Pear shape”.
- Pear shape light bulbs are similar to A Type light bulbs, except they have a larger diameter, which causes the bulb to look like a pear.
- Nomenclature: PS30,PS40.
- Numbers in each code refer to the bulb’s diameter in one-eighths of an inch.
- PS15 bulb: 15/8 = 1-7/8″ diameter
- Lighting direction: illuminates its light in Omni direction.
- Bulb Technology: incandescent, LED, CFL.
- Application:
- Office buildings and retail stores, Radio towers, cellular towers, bridge power lines, and high tension wires.
(10) S (Sign) Type Bulbs (Code: S)
- S means “Sign light”.
- Sign light bulbs also known as the “original light bulb” of the incandescent.
- Sign Bulbs also used in low-wattage lights.
- Sign Bulbs come in clear, frosted and colored options.
- Sign Bulbs available in transparent amber, blue, green, pink, red and yellow.
- Nomenclature: S30, S40.
- Numbers in each code refer to the bulb’s diameter in one-eighths of an inch.
- S15 bulb: 15/8 = 1-7/8″ diameter
- Lighting direction: illuminates its light in Omni direction.
- Bulb Technology: incandescent, LED, CFL.
- Application:
- Ideal for multiple residential and commercial uses with incandescent lamps features excellent light output and good optic control along with dimming capabilities.
- Sign light bulbs are found in outdoor signs used by casinos, hotels, restaurants, and theatres.
- Sign lamps can be as simple as a way to promote your business by eye-catching company Signage installations.
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Published by Department of EEE, ADBU: tinyurl.com/eee-adbu
