PHOTO
331-2839 bare projector lamp
Fits 2 projector models from Dell.
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The Dell 4220 and 4320 share the same lamp position, and the 331-2839 is the bulb built for it. Rated at 300 watts with a 2000-hour life, it's supplied bare, meaning the housing already in your projector is reused rather than replaced.
You may also see this lamp listed as 725-10284; it's the same part under a different reference. Since it ships bare, check the pins and housing frame on your existing lamp carrier for cracks or scorch marks before fitting the new bulb into it.
At a glance
- Wattage — 300 W
- Rated life — 2,000 hours
- Type — Bare Projector Lamp
- SKU — LA-08746
- Compatibility — 2 projector models
Common questions
Do the Dell 4220 and 4320 really take the same lamp?
Yes, both projectors were built around the same lamp position, so the 331-2839 fits either model without modification, and there's no need to check which specific unit you own before ordering.
What's the difference between 725-10284 and 331-2839?
Nothing in terms of the lamp itself; 725-10284 is simply an alternative reference for the same 331-2839 bulb, so either number on your documentation confirms a match.
How long should the 331-2839 last?
It's rated for 2000 hours at its 300-watt setting. Picture brightness typically fades before the bulb fails outright, so a dimmer image is often the first sign it's due for replacement.
Since it's bare, what should I inspect on my current housing?
Check the housing frame and electrical pins for cracks, discolouration or scorch marks. A bare lamp fits into your existing housing, so that housing needs to be sound for a safe fit.
Can I fit the 331-2839 while the projector is still warm?
It's best to let the unit cool fully first. Handling a hot lamp assembly risks burns and can also stress the new bulb's glass envelope during fitting.
This is a bare lamp — the bulb only. You reuse the housing already fitted in your projector.
Do the Dell 4220 and 4320 really take the same lamp?
Yes, both projectors were built around the same lamp position, so the 331-2839 fits either model without modification, and there's no need to check which specific unit you own before ordering.
What's the difference between 725-10284 and 331-2839?
Nothing in terms of the lamp itself; 725-10284 is simply an alternative reference for the same 331-2839 bulb, so either number on your documentation confirms a match.
How long should the 331-2839 last?
It's rated for 2000 hours at its 300-watt setting. Picture brightness typically fades before the bulb fails outright, so a dimmer image is often the first sign it's due for replacement.
Since it's bare, what should I inspect on my current housing?
Check the housing frame and electrical pins for cracks, discolouration or scorch marks. A bare lamp fits into your existing housing, so that housing needs to be sound for a safe fit.
Can I fit the 331-2839 while the projector is still warm?
It's best to let the unit cool fully first. Handling a hot lamp assembly risks burns and can also stress the new bulb's glass envelope during fitting.
Other Dell lamps in the catalogue. Codes in the same family often differ by a single character, so check the part number against your old lamp before ordering.
