A new arc bulb can lose a share of its useful life before it ever cures a part. A fingerprint on the quartz, a rushed removal from a still-hot housing, or a skipped warm-up check all happen in the few minutes a bulb change takes.
Q: What Is the Correct Way to Install a Replacement UV Curing Bulb?
A: Cool, Protect, Handle With Gloves, Install, Then Verify Output
Let the old lamp cool fully before removal, about 30 minutes after shutoff. Wear UV-protective goggles throughout. Handle the new bulb only with clean, lint-free gloves and never touch the quartz envelope with bare hands, because skin oils create localized hot spots during operation that measurably shorten lamp life. After installation, warm the lamp up, confirm output, and dispose of the spent bulb as mercury waste. The procedure below breaks those steps down for Incure’s S20™ spot and F-Series™ flood lamps.
Before You Start: Confirm the Part Number
Installation begins with the right bulb. Incure maps each replacement bulb to a lamp model: the S20™ uses the 282008 (100W) or 282068 (200W) short arc mercury lamp depending on configuration, and the F-Series™ uses the 282047 (400W mercury) or 282021 (400W metal halide). The two F-Series™ bulbs share a wattage but differ in spectrum, so confirm which one the process was qualified with. Incure’s guide to matching replacement bulbs to lamp models lists all four.
Step 1: Shut Down and Wait
Switch the lamp off and isolate it according to your site’s equipment procedure. Then wait. A hot arc bulb and its housing can burn hands. Allowing about 30 minutes after shutoff before removal is Incure’s guidance. Use the time to stage the new bulb, gloves, goggles, and a container for the spent lamp.
Step 2: Put On Eye Protection and Gloves
UV-protective goggles stay on for the whole procedure, including the post-installation output check. Every lightguide-paired S20™ configuration ships with safety goggles, and Incure’s Vison™ eyewear blocks 99% of UV across UVA, UVB, and UVC. Put on clean, lint-free gloves before opening the new bulb’s packaging and keep them on until the bulb is seated.
Step 3: Remove the Spent Bulb
Remove the old bulb following the lamp’s service instructions, and place it directly in the container set aside for it. Do not set it down on the bench where it could roll or break. Note its condition: blackening of the quartz envelope and electrode erosion are both normal aging signs, but recording them helps when comparing bulb life across lamps.
Email Us with your lamp model and any questions about the removal steps, and Incure’s engineers can walk you through the service procedure.
Step 4: Install the New Bulb Without Touching the Quartz
Handle the new bulb only by its ends or base, with gloves on, from the moment it leaves the packaging until it is seated. If the quartz envelope is touched by a bare hand by accident, follow the lamp manufacturer’s cleaning instructions before powering it, because skin oils left on the glass shorten its usable life. Seat the bulb fully and close the housing.
Step 5: Warm Up and Verify Output
Power the lamp and allow it to reach full intensity; on the S20™, that takes 1–2 minutes. Then verify output before releasing the lamp to production. On a flood lamp, measure irradiance at the work plane with a radiometer. On an S20™ spot lamp, measure at the guide tip, or take a reading with Incure’s LS217™ Lightguide Simulator, which fits Standard D, Ø5mm ports on arc spot lamps. Record the reading as the new bulb’s baseline, and run a first-article cure at the qualified settings. Establishing the baseline on a fresh bulb ties the process to a known lamp state rather than one already partway through its decline.
Step 6: Record and Dispose
Log the installation date, the part number, the lamp’s operating hours if tracked, and the baseline reading. Arc mercury lamps are commonly replaced every 1,000–2,000 hours depending on duty cycle, so the log becomes the basis for scheduling the next change. Dispose of the spent bulb according to local mercury waste regulations, not in general waste; mercury arc bulbs fall under hazardous-material disposal rules in most jurisdictions.
Handling Habits That Extend Bulb Life
Frequent start-stop operation accelerates electrode erosion and fill depletion through thermal cycling. Where the process allows, leave an arc lamp running between parts and control exposure with the timer; the S20™ provides a 1–99 second timer for this. If new bulbs are failing well before their expected life, the cause may be electrical or operational rather than the bulb itself, a set of causes covered in Incure’s article on why a UV bulb keeps blowing.
Contact Our Team to confirm the installation procedure and replacement bulb for your Incure UV curing lamp.
Visit www.incurelab.com for more information.