Philips TUV Germicidal Fluorescent Tube Lamp UV-C Filter Bulb 

Brand: Philips
Wattage: 1 x Select (4W/6W/8W/10W/15W)
Quantity: 1

Original Philips

Lamp life time: 6000 hours

Model/Specs.
G4T5: 4W, Length 135mm, Diameter 15.5mm, Socket pin gap 5mm
G6T5: 6W, Length 210mm, Diameter 15.5mm, Socket pin gap 5mm
G8T5: 8W, Length 287mm, Diameter 15.5mm, Socket pin gap 5mm
G10T8: 10W, Length 330mm, Diameter 25.5mm, Socket pin gap 13mm
G15T8: 15W, Length 436mm, Diameter 25.5mm, Socket pin gap 13mm

Produces UVC radiation to kill microscopic organisms. 
CAUTION: can be very harmful to eyes and skin. 
DO NOT expose eyes or unprotected skin to these lamps. 
SERIOUS injury and blindness could result. Lamp has application in both professional water and air disinfection units.
TUV T5 lamps offer constant UV output over their complete lifetime, for maximum security of disinfection and high system efficacy.