This 2-pin standard UV tube lasts about 300 operating hours.
This is an INDUCTION tube (see explanation)

UV gels cure under UV light. The adhesion of UV gels directly depends on the quality of the tubes. Philips tubes are suitable for most UV curing devices with a 2-pin socket (induction start).

Explanation:
Over time, imported devices with electronic start used the same tube socket as induction start devices. Which tube is right for your lamp??? It's easy to test!

If the light builds up when starting the device (blink - blink - light on), then it is induction start.
If the device starts via a light sensor and the light turns ON IMMEDIATELY (like a light switch), then it is electronic start.

You can select your tube based on this criterion! When replacing tubes, ALWAYS replace ALL tubes at the same time (so for a 4-tube device, replace ALL 4, for a 5-tube device, replace ALL 5, etc.)