Hello...What is the wiring way, does this lamp use ballast?

This is 365nm UV BL replacement bulb, it is replace for the 30W bug zapper, Its role is that the light it emits can attract insects. It can't work alone, it must be installed with the ballast, but the ballast is already installed inside the bug zapper, so in general, just replace it.

are these unfiltered? I'm looking to replace a T-8 unfiltered UV blacklight fluorescent 15 watt bulb (18in) for a silkscreening exposure unit.

This is the UV replacement bulbs for the bug zapper , can replace for silkscreening exposure unit.

why don't they last longer than 90 days

Because they are not worth buying. Honestly they were supposed to send me a replacement or give me a refund. But they never did either one I had the same problem they would burn out in 2-3 weeks.

Brand	Coospider
Light Type	Fluorescent, CFL
Special Feature	365nm
Wattage	15 Watts
Bulb Shape Size	T8
Bulb Base	G13
Light Colour	White
Voltage	110 Volts
Net Quantity	2.0 count
Number of Items	2
Brightness	650 Lumen
Shape	Bulb
Model Name	F15T8
Indoor/Outdoor Usage	Indoor
Controller Type	Push Button
Power Source	Corded Electric
Colour Rendering Index	80
Power Consumption	30 Watts
Manufacturer	Aopu Lighting Co. Ltd
Height	1.4 Inches
Length	17.7 Inches
Width	6.2 Inches
Finish types	Clear
Special Features	365nm
Batteries Included	No
Batteries Required	No
Type of Bulb	Cfl
EU Energy Efficiency Label	43.33 lumens/watt
Average Life	8000 Hours
Manufacturer	Aopu Lighting Co. Ltd

2-Pack 15W UV BL CFL Fluorescent Compact Light Bulb for 30W Electric Bug Zapper Replacement Straight Tube T8 F15 18 Inch

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