4W T5 Linear Fluorescent Lamp, 6", Black Light Blue

Standard EYE 4W T5 Black Light Blue Linear Fluorescent Light Bulb. Sold individually. F4T5/BLB/PH/G5 EYE #10815

Preheat Lamps are a starter type fluorescent where the cathode filament is preheated before any high voltage is applied to start the lamp. When the power supply voltage is applied, the starter begins discharging, the starter contact closes and current begins flowing to both of the fluorescent lamp's cathodes. The cathodes are preheated, and begin emitting electrons. There is no heat generation when the starter's bimetal and fixed electrodes close and a current flows. Therefore the bimetal cools and returns to original position, thus opening the contact. The large kick voltage generated by the ballast lights the lamp.

The colour of light radiated from a fluorescent lamp is determined by the chemical composition of the phosphor coating on the inside wall of the lamp. These lamps produce energy in the near UV or UVA range (peaking at 370 nanometers). Black Light Blue (BLB) lamps do not require the use of external filters since they have tubes made of filter glass which absorbs light but transmits UV rays. Electrical and physical characteristics are identical to regular fluorescent lamps.

Fluorescent lamps provide the following advantages:
Low operating costs
Long life
Excellent light quality
Superior CRI
Increased lumen maintenance