KNOLL HT221 Lamp / Bulb Lamp part number: 28-640 (or U2-150)

For your KNOLL HT221 projector, you can choose from: lamps with housing or bare bulbs from original and generic manufacturers...

If you prefer an easy replacement process, buy a lamp with housing.
Alternatively, choose a bare bulb without housing if you already have experience with replacing bare bulbs and are willing to deal with the more challenging replacement process.
If you do not want to compromise on projection quality and reliability, choose an original manufacturer lamp.
If you prefer a cheaper option and projection quality and reliability are not your top priorities, buy a generic lamp.
A suitable compromise is the original bulb inside option. It provides the same projection quality as an original manufacturer lamp, yet for a better price.

Easy replacement process for everyone

All you need to do is loosen a few screws in the projector, remove the entire lamp housing, and replace it with the new one. You can choose from 3 lamp options - original, original bulb inside or generic.

VIDEO - replacement of projector lamp with housing

Lamp options with housing

Original lamp with housing
The original KNOLL HT221 includes the lamp and housing from the original manufacturer. This option is recommended for its maximum reliability and easy replacement process.

Product code: Projection quality:Reliability:

Z18363OLM

1-2 weeks

£319,74 ^[1]£266,45 excl. VAT
Original bulb Inside
The KNOLL HT221 original bulb inside includes a bulb from one of the OEM manufacturers (Osram P-VIP, Philips UHP, Ushio, Matsushita, Iwasaki HSCR) and has plastic housing from a generic manufacturer. This is a very reliable solution and is cheaper than the original manufacturer option. We recommend it thanks to its reliability and affordable price.

Product code: Projection quality:Reliability:

Z46754GLM

1-2 weeks

£120,40 ^[1]£100,33 excl. VAT
Generic lamp with housing
The KNOLL HT221 generic lamp with housing includes generic plastic housing and a generic bulb from an authorised manufacturer of generic lamps. It is a cheaper solution recommended for in-home use, where projection quality and reliability are not as crucial. Even though generic lamps are not necessarily of the same quality as original manufacturer lamps, their price is nevertheless very attractive.

Product code: Projection quality:Reliability:

Z46753ML

1-2 weeks

£93,49 ^[1]£77,91 excl. VAT

More challenging lamp replacement process recommended only for the manually skilled

Replacing a bare bulb in the original projector lamp housing is more challenging than replacing the entire lamp housing. You can choose from two bare bulb options - original or generic.

VIDEO - replacement of a bare bulb without housing

Bare bulb options

Original lamp without housing
The original KNOLL HT221 lamp is a bare bulb from one of the OEM manufacturers (Osram P-VIP, Philips UHP, Ushio, Matsushita, Iwasaki HSCR) and is designed to replace the lamp in your existing lamp housing. This solution is cheaper than a lamp with housing, although it requires a certain amount of manual skills. This option is recommended for customers who already have some experience with bare bulb replacement.

The cheapest offer - currently not in stock.

Product code: Projection quality:Reliability:

Z46751OOB

1-2 weeks

£106,31 ^[1]£88,59 excl. VAT

The original KNOLL HT221 lamp is a bare bulb from one of the OEM manufacturers (Osram P-VIP, Philips UHP, Ushio, Matsushita, Iwasaki HSCR) and is designed to replace the lamp in your existing lamp housing. This solution is cheaper than a lamp with housing, although it requires a certain amount of manual skills. This option is recommended for customers who already have some experience with bare bulb replacement.

The same lamp, in stock, from another supplier.

Product code: Projection quality:Reliability:

Z46751OOB2

External stock

£151,84 ^[1]£126,53 excl. VAT
Generic lamp without housing
The KNOLL HT221 generic lamp is a bare bulb without plastic housing and is produced by an authorised manufacturer of generic bulbs. Keep in mind that replacing the bulb in the housing requires manual skills and tools. It is the cheapest option recommended for in-home use, where projection quality and reliability are not as crucial. Even though generic bulbs are not necessarily of the same quality as original manufacturer bulbs, their price nevertheless is very attractive.

Product code: Projection quality:Reliability:

Z46752OB

1-2 weeks

£89,65 ^[1]£74,71 excl. VAT

^[1]Items are shipped from the EU, but include VAT and all charges. Since we are a registered VAT payer in the UK, there are no additional charges, nor will the package be held up for customs clearance.

Delivery within 24 hours

Rewards for returning customers

Only high quality lamps