20W T9 Linear Fluorescent Lamp, 24", Black Light

Standard 20W T9 Linear Fluorescent Lamp, 24", Black Light. Sold Individually.
FLUO LINEAR BLACK LIGHT/T9/20W/PREHEAT START (PH)/MED BIPIN G13

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. Black Light Blue (BLB) lamps produce energy in the near UV or UVA range (peaking at 370 nanometers). BL lamps must be used with external glass filters that transmits near ultra violet but absorbs the visible light produced. Electrical and physical characteristics are identical to regular fluorescent lamps.

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.

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