How to Replace the SunSpot 2 Lamp Module
Arc-lamp output falls gradually over its rated life, so a SunSpot 2 that used to cure in two seconds slowly creeps to three or four. The quick-change 200 W lamp module (UV1866) makes replacement a bench task, and verifying intensity after the swap restores your original cycle time.
A metal-halide arc lamp dims as it ages; the cure doesn’t fail suddenly, it just slows, which is easy to miss until reject rates climb. The SunSpot 2 uses a quick-change module so the lamp is swapped without teardown, and a radiometer confirms the new module restored full output.
The replacement is the genuine quick-change 200 W UVA module (UV1866) for the SunSpot 2. Keep a spare on the shelf so a dimming lamp never becomes a line-down event, and a radiometer to know when to swap.
Step by Step
- 1 Recognize the aged lamp. If cure time has crept up or a radiometer reads well below your baseline, the lamp is aging. Follow the manual’s lamp-life guidance rather than running to failure.
- 2 Power down and let it cool. Shut the system down and allow the lamp housing to cool fully before opening it. A hot arc lamp is fragile and hot to handle, follow the manual’s cool-down step.
- 3 Swap the quick-change module. Remove the spent 200 W module and fit the new UV1866 per the manual’s procedure. The quick-change design means no optical realignment.
- 4 Verify intensity. Bring the system to operating condition and read intensity at your working distance with a radiometer. Confirm it is back to baseline.
- 5 Reset your cure time. With full output restored, return the exposure time to your original recipe and confirm a good cure on a scrap part.
Common Pitfalls
- Running a lamp to failure, output drifts down long before it dies, quietly slowing every cure.
- Handling a hot or un-cooled lamp, follow the manual’s cool-down before opening the housing.
- Skipping the post-swap radiometer check, verify the new module actually restored baseline output.
Questions
How do I know when to replace the SunSpot 2 lamp?
When cure time creeps up or a radiometer reads well below your baseline intensity. Arc lamps dim gradually over their rated life rather than failing outright, so measure rather than wait for a total failure.
What is the replacement lamp for the SunSpot 2?
The quick-change 200 W UVA lamp module, part number UV1866. UVB-enhanced (UV2170) and visible-cure (UV4792) modules are also available if your chemistry needs a different spectral balance.
Is replacing the SunSpot 2 lamp difficult?
No, it uses a quick-change module, so the swap is a bench task with no optical realignment. Cool the housing first per the manual, fit the new module, then verify intensity with a radiometer.
