Technical content reviewed November 12, 2026 · Tillman & Associates
Start with the existing labels
A successful replacement request starts with the fixture nameplate and the lamp’s printed identification. Take readable photographs before removing parts, following the equipment’s safe-access procedure. Include the electrical housing or driver label when the system uses separate components.
Send the lamp number exactly as printed, including suffixes. Describe whether the request is for lamps only, a power supply or an entire fixture. If the marking is unreadable, tell Tillman rather than substituting a number from a similar-looking installation.
Compare more than length
The manufacturer’s lamp specification distinguishes GTS and EGTS connectors, RGTS lamps and double-ended lamps. Use its dimensional and part-number tables to help identify what is installed. A four-pin connector or matching overall length alone does not establish compatibility with a driver and fixture.
Nominal fixture length and the lamp’s measured dimension may also be different. Show both ends and explain where you took the measurement. Include photos of sockets or connection leads so the mechanical and electrical arrangement can be reviewed together.
Legacy names and proposed substitutions
Older Steril-Aire equipment may carry names or numbers that differ from current UV Resources literature. The manufacturer also publishes a Direct Fit lamp range. That does not mean every similar lamp is an approved replacement for every legacy fixture.
Ask Tillman to check the exact original part against the proposed replacement. Where a conversion or different driver is involved, the quotation should identify it explicitly. Do not treat a brand-name change as evidence that all parts stayed interchangeable.
Plan replacement as a maintenance task
Follow the installed fixture’s replacement interval and procedure. A visible glow or an operating-status LED does not by itself establish the required UV-C output. Record installation dates and operating hours where available, and label the equipment with the confirmed replacement part number.
Disconnect all relevant power before service and follow the manufacturer’s handling and disposal instructions. Lamps contain mercury; the replacement instructions address careful handling and breakage. This guide helps prepare a parts inquiry and does not replace safe-service instructions.
What to send Tillman
- Fixture, driver/power-supply and lamp labels
- Clear photos of both lamp ends, sockets and connectors
- Measured length with measurement points identified
- Encapsulated/coated version if marked, plus existing part-number suffixes
- Quantity, installation/service date and whether lamp or fixture parts are needed
Common questions
Can I order using length and wattage?
Use those as supporting information, not the sole identifier. Confirm the exact lamp family, connections and fixture compatibility.
What if the label is missing?
Send photographs of the fixture, driver, lamp ends and measured dimensions. Tell Tillman that identification is uncertain.
Should I choose an equivalent myself?
Have the original and proposed replacement reviewed together, especially where the connector, coating or power supply differs.
Technical references
- Lamp identification and specifications · PDF ↗
00005019 A · February 2025 · PDF
- Fixture lamp replacement instructions · PDF ↗
00001340 B · PDF
- Direct Fit lamps overview · PDF ↗
Manufacturer reference; confirm exact cross-reference · PDF
Confirm the revision and exact assembly before ordering. This guide supports selection and parts inquiries; use the supplied installation instructions for the work.