Optoma Projector Lamp Replacement: Model-by-Model Guide

Optoma projector lamps carry one of two part number formats. BL-FP numbers, such as BL-FP240A, encode the lamp wattage in the digits after BL-FP, so BL-FP240A is a 240 watt lamp. SP. numbers, such as SP.L4501.001, are Optoma's alternative service part format. Either number is printed on the lamp module housing and is what determines fitment. You will also find genuine InFocus SP-LAMP part numbers listed as Optoma-fitting lamps, which is correct rather than an error, because the two brands share several optical platforms.

Optoma is one of the most widely sold projector brands in US home theatre and education, and the part numbering trips people up more than most. This guide sorts it out.

Finding your Optoma lamp part number

In order of reliability:

1. The lamp module itself. Remove it and read the label on the plastic housing. Definitive.
2. The projector manual. Listed under consumables, replacement parts or specifications.
3. The on-screen menu. Many Optoma models show lamp details under Information or Setup.
4. The label on the projector base. Gives the exact model for cross-referencing.

Do not order from the projector model name alone where you can avoid it. Optoma reuses lamps across model families and occasionally revises the lamp within a single model's production run.

Decoding Optoma part numbers

BL-FP format. BL-FP is the prefix; the following digits give the wattage; a trailing letter denotes revision. BL-FP240A is a 240W lamp, revision A. BL-FP195C is a 195W lamp, revision C. The revision letter matters, because different revisions are not always interchangeable.

SP. format. Optoma's service parts numbering, in the pattern SP.XXXXX.001. It carries no wattage information, so you must match the number exactly.

SP-LAMP format. This is InFocus numbering. Where you see SP-LAMP-LP620 or SP-LAMP-LP4Z offered for an Optoma projector, it reflects genuine platform sharing between the brands rather than a listing mistake.

Browse the full Optoma projector lamp range, and our InFocus lamp range for the overlapping fitments.

Bare lamp or complete module?

A bare lamp is the quartz burner and reflector alone. Cheaper, but fitting means transferring it into your existing cage, which requires precise seating. A burner sitting slightly off the reflector's focal point produces uneven brightness or a visible hot spot.

A complete module arrives pre-assembled and pre-aligned and fits in about two minutes.

For a single ceiling-mounted home theatre projector, the module is almost always the right choice. Working on a ladder is not the place for fiddly alignment. Bare lamps make sense when servicing several identical units on a bench.

Replacing an Optoma lamp

1. Power down and unplug. Allow at least 45 minutes cooling. Optoma lamps run hot and quartz under thermal stress can shatter.
2. Access the lamp door. On most Optoma models it is on the top or side. Ceiling-mounted units often require dismounting the projector, since the door faces the ceiling.
3. Remove the retaining screws. Usually captive. Lift the module handle and withdraw straight out.
4. Handle only by the cage. Never touch the quartz. Skin oils create hot spots that shorten life or cause rupture.
5. Seat the new module fully and tighten screws evenly. Partial seating triggers a lamp error.
6. Refit the door, remount if needed, and reconnect power.
7. Reset the lamp timer.

Our step-by-step guide to replacing a ceiling-mounted projector lamp covers the dismounting sequence in more detail.

Resetting the Optoma lamp timer

The timer counts hours since the last reset and cannot detect that a new lamp has been fitted. Skip the reset and the projector keeps warning you and may eventually restrict lamp power despite a brand new lamp.

On most Optoma models: Menu > Setup > Lamp Settings > Lamp Reset, then confirm Yes. Some models place it under Options or require a button sequence during standby. Check your manual.

Only reset after genuinely fitting a new lamp. Resetting on an old lamp destroys your only record of remaining life.

If the new lamp does not light

Common causes, in the order worth checking:

• Module not fully seated. The most frequent cause. Remove and refit firmly.
• Lamp door not closed properly. An interlock switch prevents operation.
• Timer not reset and the projector in protective mode.
• Wrong revision. A BL-FP number matching except for the trailing letter may not work.
• Ballast failure. If the projector attempts to strike and fails repeatedly, the fault may not be the lamp.

See new projector lamp not working for the full checklist.

Quick reference

• BL-FP numbers: digits give wattage, trailing letter is revision
• SP. numbers: match exactly, no wattage encoded
• SP-LAMP numbers: InFocus format, genuine Optoma fitments exist
• Revision letters matter — do not assume interchangeability
• Ceiling mounted: buy the module, not the bare lamp
• Cool down: 45 minutes minimum
• Always: reset the timer after fitting

Frequently asked questions

How do I find the right lamp for my Optoma projector?

Read the part number on the existing lamp module housing, which will be in BL-FP, SP. or SP-LAMP format, or check the consumables section of your manual. Ordering from the projector model name alone is unreliable because Optoma reuses lamps across models and revises them mid-production.

What does BL-FP mean on an Optoma lamp?

BL-FP is Optoma's lamp part number prefix. The digits that follow give the lamp wattage, so BL-FP240A is a 240 watt lamp. The trailing letter is a revision marker, and revisions are not always interchangeable, so match the full number including that letter.

Why is an InFocus SP-LAMP part listed for my Optoma projector?

Because Optoma and InFocus share several optical platforms, so some lamps genuinely fit projectors from both brands. An SP-LAMP number offered as an Optoma fitment reflects real cross-compatibility rather than a listing error.

How do I reset the lamp timer on an Optoma projector?

On most Optoma models the path is Menu, Setup, Lamp Settings, Lamp Reset, then confirm. Some models place it under Options or use a button sequence in standby. Reset only after fitting a genuinely new lamp, since resetting on an old one removes your record of remaining life.

My new Optoma lamp will not turn on. What is wrong?

Most often the module is not fully seated, so push it home firmly and retighten the screws evenly. Also check the lamp door is properly closed, since an interlock prevents operation, and confirm the timer was reset. If the projector repeatedly tries to strike and fails, the ballast rather than the lamp may be at fault.

Finding your Optoma lamp

Lamps Authority stocks over 260 Optoma projector lamps in bare and complete module formats, including the InFocus cross-compatible fitments. Browse the Optoma lamp range, or send us your BL-FP or SP. number, or the projector model, and we will confirm the correct lamp and revision before you order.