Fluorescent Desk Lamp Ballast
Fluorescent tubes have a negative resistance characteristics and therefore cannot be directly connected to the mains.
Fluorescent desk lamp ballast. You can get a new ballast at a hardware store or home center and install it in about 10 minutes. When the lamp first turns on the path of least resistance is through the bypass circuit and across the starter switch. Works nicely lights come on quickly and without flickering. The classic fluorescent lamp design which has fallen mostly by the wayside used a special starter switch mechanism to light up the tube.
Shop philips lamps hm2sp20tpi at stoneway electric supply. In other words if the current in the lamp increases the equivalent. These compact fluorescent lamps or cfls have all of the advantages of ordinary fluorescent lamps but fit into most table lamps and incandescent fixtures. When your fluorescent light flickers or makes a loud and annoying hum a degrading ballast is the cause.
The wiring of the ballast was different than the one it replaced but the included wiring diagrams make it easy to hook up provided you know how to read a wiring diagram make sure to read the spec sheet as the maximum wattage this. The inductive ballast the inductive ballast is just a big inductor wound on a laminated iron core. The ballast takes in electricity and then regulates current to the bulbs. You can see how this system works in the diagram below.
Over the years fluorescent lamps in approximately the shape of incandescent lamps with built in ballasts have been evolving. The ballast provides enough voltage to start the fluorescent bulbs and once they are. The fluorescent lamp was invented in the 1930s so the magnetic ballast has been around for quite a while now. A typical ballast will generally last about 20 years but cold environments and bad bulbs can decrease this lifespan significantly.
Nowadays magnetic ballasts are a rather outdated technology that manufacturers are phasing out and so they re usually only found on older types of lights. Phosphors have been improved to the point where the color is very similar to that of incandescent lamps. Fluorescent lights use either an electronic or a magnetic ballast. A fluorescent fixture requires a ballast to send the proper amount of electricity to the fluorescent bulbs.
While the initial cost is high list prices of 5 to 20 but often available for less this is easily. However buying a ballast can be expensive so consider pricing a brand new fixture for. Fluorescent lamps with magnetic ballasts flicker at a normally unnoticeable frequency of 100 or 120 hz and this flickering can cause problems for some individuals with light sensitivity. Log in or register to view all philips lamps hm2sp20tpi pricing and availability for your job or project.
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