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Product Overview:
  • 3 finishes
  • Ultra-thin profile
  • Light bulb included
  • Surface or recessed mount
  • Learn More

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Xenon Low Voltage Ultra-Slim Lights

Pegasus Lighting BBB Business Review

Xenon Low Voltage Ultra-Slim Lights

Item #PNM-254
OptionsSelect a Finish: 
AvailabilityUsually ships the next business day
Quantity  Add to cartAdd to Wishlist

About our Xenon Low Voltage Ultra-Slim Lights
Need Help? If you need assistance with selecting the right components for your lighting project, please download this Xenon Low Voltage Ultra-Slim Lights worksheet, complete it, and fax it to 724.846.8833. Then a Technical Customer Service Rep will contact you by email or phone to discuss your project further.

These xenon ultra-slim cabinet lights are low-profile, long-lasting and dimmable. The color rendering index of their light output is a perfect 100, and they are available in three finishes to match your decor. Use these low voltage puck lights in cabinets, display cases, exhibits, offices, medical work stations and bars for a striking effect that provides quality task lighting. Also ideal for under cabinet lighting.


  • 3 Models:

    Finish White Black Chrome
    Model # PNM-254-W PNM-254-B PNM-254-C
  • Ultra-Thin Profile: when recessed-mounted ultra-thin profile (9/16in) allows installation without the need to drill completely through the cabinet surface; only 13/16in in total height when it is surface-mounted; diameter is 2.75in.
  • Cutout: when recessed mounted, a hole of only 2-1/8in is required
  • Die-Cast Aluminum Housing: die cast aluminum housing with decorative plastic outer ring
  • Clear Glass Lens: high heat-rated clear glass cover
  • Dimmable: may be dimmed with a dimmer designed for an electronic low voltage transformer.
  • Intended to Shine Down: has been designed to be used so that the light is directed downward. If the Puck Light is installed so that it is facing upward, too much heat may be trapped inside the fixture.


  • 10W Xenon Light Bulb Included: a 10-watt 12-volt xenon bipin light bulb is supplied with each fixture.
  • Color Rendering Index: CRI is 100 for all xenon light bulbs (100 is considered to be the best)
  • Good Lamp Life: rated life is 10,000 hours on average (In contrast, a 10-watt bipin halogen lamp is generally rated at about 2,500 hours.)
  • Lamp Voltage: 12 volts (Requires a transformer.)
  • Bipin Base: G4 bipin base (pins are spaced 4.0 mm apart)
  • Lamp Replacement: when the bipin lamp needs to be replaced simply screw off the face of this fixture (counter-clockwise), pull the bipin lamp out of its socket, push a new bipin lamp into the socket, and screw the face of the fixture back on (clockwise)


  • May be Surface or Recessed Mounted: may be surface mounted or recessed mounted
  • Surface Mounted: if this fixture is surface mounted, it will stick down only 13/16in
  • Recessed Mounted: if this fixture is recessed mounted, it needs a cutout hole diameter of
    2-1/8in and a hole depth of only 9/16in with the outer trim sticking out only 0.25in
  • Long Electrical Leads: each Xenon Low Voltage Ultra-Slim Cabinet Light comes with two 24-inch 18 AWG leads with a plastic connector at the end. The plastic connector is simply plugged into a Multi-Tap Connector which, in turn, is hardwired to a transformer. These leads could be lengthened by using additional 18 AWG wire connected with a small terminal block.
  • Easy to Install: please refer to these Installation Instructions (PDF). Always check local electrical codes and the National Electrical Code (NEC) before installing any lighting products. It is also wise to consult with a licensed electrician in your geographical area about any electrical details that you might have questions about and to make certain that you are satisfying all of the appropriate electrical codes.


  • Quiet Electronic Transformer: xenon low voltage ultra-slim lights require a 12-volt electronic transformer to operate properly. To view our complete selection please visit our Electronic Transformers section of our website.
  • Multi-Tap Connectors: multi-tap connectors provide an easy method to wire multiple fixtures to an electronic transformer. Multi-tap connectors come in two sizes; one connector (PNM-143) can accommodate up to 3 fixtures while the other connector (PNM-146) can accommodate up to 6 fixtures. Note that the Molex connector on the end of the lead wires generally needs to be removed and spliced with the lead wires of the transformer.
  • Small Terminal Block: To connect the Multi-Tap Connector to a transformer we recommend using a small terminal block.
  • Replacement Light Bulbs
  • Lutron Electronic Low Voltage Dimmers


  • Large Quantity Discount: If you would like us to quote on a large quantity of Xenon Low Voltage Ultra-Slim Lights, please call us at our toll-free number or use the online Quotation Request for Large Quantities form.  We are always happy to provide you with our best large quantity pricing.

    ETL Listed  1-Year Warranty  Satisfaction Gaurantee  Quick Ship Item    Installation Difficulty

Specifications & Measurements

When determining how many Xenon Low Voltage Ultra-Slim Lights you will need for under cabinet lighting you first will have to measure the space where the fixtures will be attached. To do this you should NOT measure the face of the cabinets; you should measure the "cavity" under the cabinet where the fixtures will actually be placed. We recommend that you then refer to the following table when determining how many Ultra-Slim Lights you will need. From the range given below select the number of fixtures that seems right for your situation.

Cavity Measurement Xenon Low Voltage Ultra-Slim Lights
6in - 10in 1 Ultra-Slim Light
11in - 18in 2-3 Ultra-Slim Lights
19in - 26in 3-4 Ultra-Slim Lights
27in - 34in 4-5 Ultra-Slim Lights
35in - 42in 5-7 Ultra-Slim Lights
43in - 50in 6-8 Ultra-Slim Lights

Customer Project Photos
Sometimes our customers send us pictures of their successful lighting projects, and we love to show them off! Take a gander at this kitchen upgrade from St. Louis using our very own xenon low voltage ultra-slim lights as in-cabinet puck lighting illumination all of those beautiful dishes.
Picture of ultra-slim lights used inside cabinets to higlight dishes
Picture of low voltage xenon ultra-slim lights inside glass door cabinets
To learn more about this customer's lighting project and to see more photos please visit

Product Reviews
Xenon Low Voltage Ultra-Slim Lights
4 Stars based on 9 Review(s)
Abingdon, VA
5 Stars
I would recommend this item to a friend.

Great Lights and Great Price!
October 27, 2014
Bought six of these to hardwire in under my cabinets. Did not go with the number of lights recommended. Instead, I went with one light per cabinet door and this has provided all the lighting needed. The install did take a little work, but not difficult. I bought 16 gauge wire and pulled from each light to the transformer. Very easily to install and remained hidden under the cabinet.

Westerville, OH
3 Stars

Xenon slim puck lights
August 18, 2014
They are slim which is very nice. They are advertised as zen on lights however package says they are halogen lights. Had to supply my own screws as screws supplied were over 1/2" high and inferior quality. What cabinet bottoms have material greater than 1/2" in depth? Certainly not mine. Made rather cheap and each light has only 18" of lead wire to connect to power supply. Like you are going to install six lights all within a 3 foot area?! Had to cut the wires from each light and run my own 18-2 AWG wire from light to power supply. Also had to splice the connector to 18 AWG for the connector to fit in power supply,,,,lots of work.
Slim design
Many...see review

United States
5 Stars
I would recommend this item to a friend.

Great little lights
January 15, 2014
These lights are very well made and appear to make it easy to replace a light bulb if one burns out.

4 Stars
I would recommend this item to a friend.

Good for the purpose
August 23, 2012
I recently bought some of these lights for my kitchen remodel. I had an electrician hardwire the transformer, then I did the remainder of the installation myself. I do not think you need as many of the lights as indicated in the directions, consistent with one of the other reviews. I went with one light per cabinet door except two under a larger corner area. Also consistent with a different review, I agree the screw quality was lacking, even with a predrilled hole. I had to be very careful not to strip the screws. I was a little confused when I first received the lights, they were labeled as halogen, however they give you a xenon bulb to swap out. I ended up having to go back to order an additional multitap connector, some terminal blocks, and picked up some extra 18 gauge wire to run everything. They don't end up reaching quite as far as you think they will. Once installed, they give off great light, are dimmable, and my 3/4 inch light rail pretty effectively masks the installation so I'm happy with the result for the cost.
Low cost Great light Low profile
Screws Installation takes some extra parts and wire beyond what is recommended in accessories tab

Canton, Georgia
4 Stars
I would recommend this item to a friend.

Cost-effective and Functional
June 27, 2012
Bought these because they are hard wired and dimmable. They were easy to install, came with additional bulbs and look great. They do have a fairly focused beam so you can (a) go with the included diffuser lens or (b) go with the Pegasus number of recommended lights (I went with fewer than they recommended). Only part of my order transmitted and Pegasus called me to make sure I had all the items I would need for the install. Awesome service, and a solid product. They look nice under my kitchen cabinets.
Easy install Hard wired Dimmable Compact - so they hide well beneath the cabinets
Light is more focal than expected. Would like a wider beam.

Boulder, CO
5 Stars
I would recommend this item to a friend.

June 17, 2012
Looks great and excellent phone help. Thanks Pegasus, just what I wanted.

Cumming, GA
5 Stars
I would recommend this item to a friend.

Great Options
March 17, 2012
The size and color were perfect for the job.
Great Price

Madison, WI
3 Stars
I would recommend this item to a friend.

Small but not too convenient for a wall niche
February 29, 2012
I wanted something small enough to fit in our wall niche and this fit the bill. It is small and compact. The only big downside is that the cap doesn't unscrew off counter clockwise as it states. In fact once you push it in, it is very difficult to remove the cap to change the light without significant effort. This really messed up the installation of the niche light. Finally we figured out that if you press the sides at exactly 2 spots, the cap comes off. I have trouble doing it because if you don't do it right, it will not come off. So I give it 3 stars...looks good but will be so difficult to change the light bulbs when mounted in a wall niche.

Naples, FL
4 Stars
I would recommend this item to a friend.

Xenon slim lights
February 11, 2012
I believe the lights are going to work well. However they were not the easiest to install. The screws provided were very inferior. They tended to screw in sideways. Possible cause... quality of the screw. And the stamp out of the base piece had a rim. Also the screw tended to strip. I ended up using different screws. I used my existing wiring and did not need the other accessories that I purchased and I have returned them.
Slim height, price and service
Poor installation instructions and poor quality of mounting parts.

Questions & Answers
By Adalgisa Constanzo-Muller from Orlando,FL on June 18, 2013
I am buying 7 of these. 3 for the first level of entertainment center (i.e., top), then 2 go on second level and another 2 below it. I have hardwire access at 2 levels. So 3 puck lights for one access, 2 for another, and 2 for another. How many transformers do I need and what type. What else do I need?

By Jacob from Pegasus Lighting on June 18, 2013

For the top level powering 3 puck lights, select a 60W hardwire transformer and a 3 fixture multi-tap connector.

For the second level powering the other 4 puck lights, select a 60W hardwire transformer and a 6 fixture multi-tap connector.

Transformer -

Multi-Tap Connector -

By Lisa from DC on December 1, 2012
How many come in each pack? One or two?
By Jacob from Pegasus Lighting on December 3, 2012


These are sold individually.

By Gab from NY, NY on January 5, 2013
Do they provide warm (yellow) light or white light? How many Ks?
By Jacob from Pegasus Lighting on January 7, 2013


Kelvin temp is 2800K, which is warm white, almost the exact same as traditional incandescent.

By Craig from Bend, OR on December 15, 2014
How are these connected to the 110 source, and does this come with a dimmer?
By Jacob from Pegasus Lighting on December 16, 2014

No, it does not include a dimmer.

This product requires a low voltage transformer to connect to 120V.

The transformer "transformers" the line voltage down to the 12V required for the lamp.

Basically your line voltage will wire to the transformer which in turn will wire to the light fixture.
By Karen from Michigan on December 16, 2014

I replaced existing lights that were hard wired. There is no dimmer, although perhaps you could add one. I believe you need something to reduce the voltage from 110. Be sure to read or call them. I had to have an electrician do the work, but I love the lights!
By Matt from Kansas City, MO on December 16, 2014

These have to be run into a transformer that drops the 110 down to a voltage the lights can handle. I just put the transformer inside an electrical utility box and connected that directly to the 110V source. I bought a dimmer switch with mine which works great.

By Peter from MN on September 25, 2012
What is a transformer? Is it necessary when you are connecting these lights to a switch?

By Jacob from Pegasus Lighting on September 26, 2012

Yes, a transformer is necessary for these lights regardless of your setup.

A transformer "transforms" your line voltage down to a lower voltage - generally either 12 or 24 volts. These lights require 12 volts.
By James from Weehawken, NJ on September 26, 2012

The transformer is necessary for any low-voltage lights whenever you hook them up to line voltage (i.e. the types of wires that you run from your electrical panel to the light, switch whatever -- like Romex or armored cable). Hard wiring a transformer means that you will have use an electrical box to house the transformer and its connections. What I think is a better option is to wire a switch to a standard outlet box, then get a plug-in transformer to plug into the outlet and connect that to these lights (like this one -- If you have the space, you can put the outlet and plug-in transformer above your upper cabinets where it won't be seen.

By Amanda from Maryland on April 1, 2014
I am interested in doing the surface mount for this product. I want to attach these to a thin shelf. How long are the screws to surface mount it?
By Jacob from Pegasus Lighting on April 2, 2014

The included screws are about 0.5in in length.
By Bill from North Bloomfield, OH on April 2, 2014

the screws that came during my installation were approx. 3/4 inch. I surfaced mounted under standard factory cabinets. I just tightened them by hand until the mounting frame was secure & tight and the screws did not protrude into the cabinet.

By Mary Ellen from Weston, FL on January 21, 2013
I have 4 glass upper cabinets to light...they are 28" wide and 18" one of the xenon ultra slim puck lights enough for each or should I get two per cabinet? Also I'm confused about the transformer...the electrician said they would be hard can I hide the transformer on top of the cabinets. And which one should I purchase?

By Jacob from Pegasus Lighting on January 22, 2013


I would recommend at least 2 lights per 28in.

In terms of the transformer, simply multiple the total # of puck lights by 10W for your total wattage rating. Then select a hardwire transformer equal to or slightly greater than this total.

If you use a total of 8 puck lights that would mean you need a transformer rated for at least 80W.
By Brett from NJ on January 26, 2013

I have a 28" wide cabinet and 2 provides good coverage. I used this transformer LVT-151-12V-AC, Electronic Low Voltage 150W 12V AC Transformer, but there are others depending on how many lights you are going to run. I had an electrician hardwire it in a cabinet as you suggest with a switch on a dimmer externally. I then handled installing the lights and wiring through the cabinets myself. You'll also likely need multi-tap connectors and some extra wiring to hook it all up.

By George from Milwaukee, WI on January 3, 2015
The description states "Recessed Mounted: if this fixture is recessed mounted, it needs a cutout hole diameter of 2-1/8in and a hole depth of only 9/16in with the outer trim sticking out only 0.25in". Question is: doesn't not drilling through the cabinet base cause excessive heat buildup in the fixture?
By Jacob from Pegasus Lighting on January 4, 2015

Heat is projected with incandescent sources - so the concern is the heat directing down and out of the fixture. It will not cause excessive heat buildup as long as you have adequate ventilation. We generally recommend 1 cubic foot of space per puck for proper ventilation.

By David from Indianapolis, Indiana on September 30, 2013
How do you wire in a dimmer for a 3 light kit? Do you put the dimmer on the 120v input or on the low voltage side?
By Jacob from Pegasus Lighting on October 1, 2013


Power will connect to your dimmer, which in turn will connect to the transformer, which in turn will connect to the lights.

By George from Milwaukee, WI on January 10, 2015
I test installed the light and it is too dim. Can I put a 20 watt lamp in this fixture? It will be above the countertop so no enclosure below it.
By Jacob from Pegasus Lighting on January 12, 2015

George, I would not recommend placing a higher wattage lamp in the puck light due to heat concerns.

By Allen from Chicago, Illois on October 5, 2013
I would like to put two of these under each cab. It appears I can use one transformer for two lights. Is this accurate? If so, where can I purchase the light without the kit?
By Jacob from Pegasus Lighting on October 6, 2013


As long as your transformer is rated for 20W, then yes you can use one transformer for two of these puck lights.

We offer these puck lights individually and not as kits. Simply add the two puck lights of your desired finish to your cart and then visit the Accessories section on this page for information about transformers and helpful connectors.

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