How to find the right Arc Lamps AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Arc Lamps
- Lamp type matched to the instrument
- Replace like with like: xenon short-arc, mercury short-arc, mercury-xenon or deuterium. Never substitute one gas type for another. Each fill has a different spectrum, voltage and current characteristic, and the instrument's power supply and optics are designed around one of them.
- Exact OEM part or a documented cross-reference
- Match the instrument maker's part number, or use a lamp-maker cross-reference that confirms the same wattage, base and dimensions. Wattage alone is not enough. Arc gap, overall length and electrode position set where the arc sits relative to the reflector or collimating optics.
- Base, socket and mounting dimensions
- Base type, overall length, light-center length and connector or cable style must match the housing. A lamp that fits physically but puts the arc off the focal point loses much of its usable output, and it can overheat the seals.
- Polarity and burning orientation
- DC short-arc lamps must be wired with the anode and cathode as marked and mounted in the orientation the datasheet specifies. Reversed polarity or the wrong orientation quickly destroys the electrodes, and it can cause bulb failure.
- Ozone-free versus ozone-producing quartz
- Use ozone-free (UV-blocking-doped) envelopes unless your application needs deep UV and the housing is vented or purged. Ozone-generating lamps emit short-wave UV that makes ozone, which is a hazard in unvented enclosures.
- Rated life and replacement schedule
- Track operating hours and replace the lamp at or before the manufacturer's rated life. Output drifts and arc stability worsens with age. Lamps run well past their rated life are more likely to rupture.
Brands that matter
- Ushio: Broad range of xenon and mercury short-arc lamps for projection, microscopy and UV curing.
- Osram: XBO xenon and HBO mercury short-arc lines, widely cross-referenced in microscopy and cinema equipment.
- Excelitas: Makes Cermax ceramic-body xenon lamps used in medical illuminators and instrumentation.
- Hamamatsu: Deuterium and xenon lamps for spectrophotometers and analytical instruments.
- Heraeus Noblelight: Deuterium and specialty UV lamps for analytical and industrial use.
- Newport (Oriel): Research arc lamp housings and matching replacement lamps for solar simulation and lab light sources.
What to avoid
- Unbranded lamps sold without a datasheet showing dimensions, polarity and rated life.
- Touching the quartz envelope with bare fingers. Skin oils cause hot spots and devitrification, so clean the envelope with alcohol if it gets touched.
- Handling or removing short-arc lamps without a face shield, gloves and the protective jacket. They are under pressure even when cold.
- Substituting a different wattage or gas fill to save cost when the power supply is not rated for it.
- Disposing of mercury-containing lamps in regular trash.
Questions
Can I use a xenon lamp in place of a mercury lamp of the same wattage?
No. They need different power-supply settings and produce very different spectra. Use only the lamp type your instrument specifies.
Why does my new lamp flicker or wander at first?
Short-arc lamps often need a burn-in period and a warm-up before the arc stabilizes. Persistent flicker usually points to an aged lamp, a misaligned lamp or a power supply mismatch.