The Hi-Tech Lamps GTL3 is a 3W Germicidal (AKA 254nm or UVC ) Lamp with 0.16 Watts UV. Typical lifetime is 2000 hours. This lamp has an E17 screw base on the 20mm diameter x 63mm long clear T7 tube. This item is made in Japan, and was commonly available from Ushio, Sankyo-Denki, Fisher Scientific, Eiko, Hikari, American Ultraviolet, among many others, as part numbers GTL3W, GTL3G, PO300-0350, 29-258-23, GRM0036, Ushio 3000730, EIKO 41568, and many more. 

Specifications 

• Voltage:  10.5 Volts

• Current:  0.30 Amps

• Lamp Power: 3Watts

• Max Overall Length (L): 2.5 inch/63 mm

• Max Diam. (D): 0.79 inch/20 mm

• Bulb Shape: T-6 (ø 3/4")

• Base Type (B): Intermediate Screw (E17)

• Avg Life 2000 hrs

• Output: Germicidal(254nm) Ozone Free

• Total UV Output: 0.16 Watts 

• UV Micro Watts: 1.8uW/cm2 at 1M

• Mercury Content: 7 mg

Some of the equivalent replacement lamps are as follows:

• Atlantic Ultraviolet 05-0002A
  
• Dentec 4000
• Enviracaire BMW-211D
• Enviracaire EWM-220
• Enviracaire EWM-300W
• Enviracaire EWM-350
• Enviracaire EMW-211D
• Germ Guardian GG1000
• Germ Guardian GG1000CA
• Germ Guardian GGH200
• Germ Guardian LB1000
• Honeywell HWM-500 lamp, no handle
• Hunter Air 30836
• Hunter Air 30841
• Hunter Air 30847
• Hunter Air 30850
• Philips Lighting HX6150
• PlusRite 5003
• Slant Fin GF-100
• Slant Fin GF-200
• Slant Fin GF-210
• Slant Fin GF-210W
• Slant Fin GF-211D
• Slant Fin GF-220
• Slant Fin GF-240
• Slant Fin GF-300W
• Slant Fin GF-350
• Slant Fin GFH-150
• Ushio 3000022
• Eiko 41568
• Vicks Humidifier V-790