When the metallic strip of starter flips back or when the starter switch turns off, the ballast provides high voltage through the electrodes of the Fluorescent lamp. These bulbs give off the brightness of fluorescent light in an even circular shape. A fluorescent light does not have the usual glowing filament of an incandescent bulb, but instead contains a mercury vapor that gives off ultraviolet light when ionized. A CFL is designed to replace an Incandescent lamp. © The stroboscopic effect in the fluorescent lamp . Fluorescent lamps are color-rated in terms of Kelvin degrees. Knowing how to find a fluorescent light bulb that fits all of your needs will save you time, worry and ensure you get the right one every time. Circular Fluorescent Lamp. Incandescent bulbs are the traditional option, the first type of light bulb invented and … LEDs claim to be ultra long lasting - lasting for 25-30 years, depending on which one you buy and how you use it. The difference is in the diameter. A fluorescent lamp is a low weight mercury vapour lamp that uses fluorescence to deliver visible light. Fluorescent circles give off a glowing halo effect. A lamp is an artificial source of light. total123 May 13, 2012 at 8:19 PM. Ballasts are sound rated and are marked with letters "_____" through "_____." HID lamps, like fluorescent lamps require a ballast to provide the proper starting voltage for the lamp and limit the operating current once the lamp is ignited. Certain longer fluorescent/LED tubes will be assessed a shipping surcharge; this is to cover all of the additional shipping materials that are needed to ensure a safe arrival. The property owners whose lights I was repairing had kept the original packaging for two generations of GE brand T8, 36-inch fluorescent bulbs that were used in various fixtures in the home. For good quality lighting, we recommend to specify a CRI of at least 80. "FB" or "FU" instead of "F" means the lamp is bent or U-shaped. You know – those bowls that are typically in hotel or church hallways on the ceiling? If you do not see the base type you are looking for, give us a call at 800.784.1998, and we can help you locate the correct bulb. We discuss two types of fluorescent lamps: Hot Cathode, Cold Cathode. If you take them off, you’ll probably find two fluorescent circlines inside, giving the fixture an even glow. Fluorescent lights use either an electronic or a magnetic ballast. Note that some lamps may be designated F40T12/ES, but the lamp draws 34 instead of 40 watts; the "ES," a modifier which stands for "energy-saving," indicates this. hbspt.cta._relativeUrls=true;hbspt.cta.load(455757, '8a89d484-1af2-4765-ad4c-f2f323c069cc', {}); T8s are 1-inch diameter fluorescent tubes, and they are the most prevalent of all fluorescent tubes. Certain longer fluorescent/LED tubes will be assessed a shipping surcharge; this is to cover all of the additional shipping materials that are needed to ensure a safe arrival. T12 Bulbs How the Fluorescent Lamp Works. //