Good Earth Lighting, Inc. G9163-SS-I Sunspot Three-Light ...

• 3-light low-voltage halogen lighting puck
• For undercabinet accent lighting
• Low-profile; may be surface mounted or recessed
• Stainless steel construction (unfinished)
• 3-year warranty; requires 3 20-watt G4 halogen bulbs (included)

Amazon.com Product Description:
If you need accent lighting in a tight spot, the puck is the answer. Good Earth Lighting's Sunspot line of halogen undercabinet "puck" lights give you bright, clean light in a small, low-profile housing that will fit just about anywhere (2-3/4-inch diameter by 1-inch depth). Some assembly is required--you have to install the roller on-off switch, for instance--but the included owner's manual makes the process clear. Installation is straightforward, too (the puck may be surface- or recess-mounted), and the unit comes with everything you need, including screws and wire guides. Overall, a great option for discreet undercabinet accent lighting, especially in cases where space is at a premium. For other finish options, see #G9163-BK-I and #G9163-WH-1. If you need more light, you may want to look into the G9165 series of five-lamp pucks. Three-year warranty. UL listed.--Josh Dettweiler What's in the Box Puck housing (stainless steel), glass diffuser, three 20-watt halogen bulbs, magnetic transformer, power cord, hardware kit (wire guides, screws, grommets, on/off roller switch assembly), owner's manual

They are what they are:
Plastic lights, but they are often hiden, so they do the job well. I used a bunch of undercabinet lights. If installed right, they are great.