FLUORESCENT LAMP OPERATING PROCEDURES
T8 HIGH LUMEN FLUORESCENT LAMP
Recommended usage on T8 F32 Instant Start ballasts with a minimum circuit starting voltage of 550 V rms.
Please note: the above applies unless any of the equipment is specifically listed for 25, 28 and 30 watt lamps. Any of the situations previously stated could result in lamp starting and stabilization problems, or system compatibility issues.LAMP SWIRLING
Sometimes fluorescent lamps may appear as if the light is swirling or spiraling inside the tube. This phenomenon is known as lamp swirling or spiraling and is usually caused by cold temperatures. Should swirling or spiraling occur, the best solution is to protect the lamps from the cold draft, air-conditioning or other cold sources by using a tube guard, available at an authorized STANDARD distributor. It is important to verify that the tube guard is rated for the lamp/ballast combination being used.
Occasionally, an unappealing visual phenomenon, known as striations, may occur under specific circumstances.
Striations which are determined by a lamp’s physics are a sequence of light and dark bands of light within a fluorescent lamp, which appear to either move down the length of the lamp, or appear as a standing wave.
Lamps made with heavy fill gases such as Krypton are prone to striations, which are made worse when operated in low temperature applications or where the lamp is directly affected by localized air flows. Striations are usually more common in energy saving lamps, but can also affect full wattage lamps. Striations do not imply an electrical problem; they are simply an undesired visual condition. Lamp performance and life are not affected by striations.
Energy saving lamps usually require higher operating temperatures than full wattage lamps. Energy saving lamps usually have a minimum operating temperature of 15°C (and sometimes higher). In order to ensure the correct application for the lamps, the lamp operating temperature should always be verified.
Full wattage lamps (ex: F32T8 32 W)
Striations in full wattage lamps are not common, but can still occur. When they do, it is typically the result of one or a combination of the following situations:
LOW LAMP CURRENTS: Striations can occur should the lamp current become too low (i.e. deep dim operations). If using a dimming ballast, this issue can be resolved by adding extra circuitry.
AIRFLOW: A lamp which is exposed to airflow across the lamp will often have striations. This is especially common when the lamp is located close to an air vent. Shielding or deflecting the flow of air to the lamp will typically resolve the incidence of striations.
AMBIENT TEMPERATURE: The bulb wall temperature of a lamp is directly proportionate to its light output. Every lamp is rated for maximum light output at a given optimal operating temperature. When presented with extreme cold ambient temperatures, the light levels will noticeably drop and striations may appear. Using tube guards or luminaires with more heat retention in the lamp compartment may decrease or eliminate the striations. Please contact Standard Products to ensure tube guard and lamp compatibility.
Energy saving lamps (ex: F32T8 30 W, 28 W, OR 25 W)