Bulb FAQs


Composition of CFL

CFLs have two main components: a gas-filled tube (also called bulb or burner) and magnetic or electronic ballast. The tube contains mercury vapour.

Figure 1: The most common type of CFL in Kenya (single-turn double helix)


Composition of
incandescent lamp

1. Outline of Glass bulb
2. Low pressure inert gas (argon, neon, nitrogen)
3. Tungsten filament
4. Contact wire (goes out of stem)
5. Contact wire (goes into stem)
6. Support wires
7. Stem (g lass mount)
8. Contact wire (goes out of stem)
9. Cap (sleeve)
10. Insulation (vitrite)
11. Electrical contact


Measures to Take if You Break a CFL Bulb

CFLs contain trace amounts of mercury and should be carefully disposed of--instead of being thrown out with the trash.
Broken bulbs to be placed in a sealed bag and can be dropped off at ACF which is a designated recycling facility.


Figure 2: An electronic ballast and permanently attached tube in an integrate CFL. The electronic ballasts contain a small circuit board with rectifiers, filter capacity

Mob: +254 722 537 526,
+254 738 133 048.
Fax: +254 20 248 9268
Email: info@sintmond.com

Opposite City Cabanas Flyover, Off Mombasa road
P.O. Box 11804 - 00100,
Nairobi - Kenya
Tel: +254 - 020 - 2489268