Neptune Post Cap by LMT Mercer

Neptune Post Cap by LMT Mercer

Neptune Post Cap by LMT Mercer

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Starting at: $4.99

The final product price may change based on the combination of size/type/finish/style you choose.

Availability: Choose options above to see availability


Over 75% of orders qualify! details

LMT Mercer Group logo

 Budget Friendly   Solar Powered  Customizable

LMT Mercer Group offers a variety of budget-friendly deck lighting products... Learn More



The Neptune Post Cap from LMT is a stylish cap that marries the sleek look of curved edges with the traditional look of a high-top pyramid. With a huge variety of sizes and colors, the Neptune cap is a durable and stylish choice for anything from wood 4x4s to vinyl 6x6 sleeves.

Unsure about your size? Post caps are meant to fit over the post, so it is important to measure your posts carefully to ensure a proper fit.

Product Specifications

ColorsStandard Colors: Almond, Beige, Khaki, White
Premium Colors: Antique Brown, Antique Copper, Antique Gold, Antique Gray, Black Hammertone, Patina
Pack SizeEach
Post Cap Opening Size3-5/8", 4-1/16", 4-9/16", 5-1/16", 5-5/8", 6-1/16"
Material TypeVinyl
(width x depth x height)
3-5/8" = 6" x 6" x 2-1/8"
4-1/16" = 6" x 6" x 2-1/8"
4-9/16" = n/a
5-1/16" = 7-1/4" x 7-1/4" x 2-1/4"
5-5/8" = 7-1/4" x 7-1/4" x 2-1/4"
6-1/16" = 7-1/4" x 7-1/4" x 2-1/4"
Inset Measurement 1/2"
Included AccessoriesNone
WarrantyView LMT Warranty Information

Additional Information

Additional Information

Manufacturer LMT Mercer Group
DDID 6406

LMT Mercer Group logo

LMT Mercer Group offers a variety of budget-friendly deck lighting products. Founded in 1987, their LED and solar technologies are constantly under development in order for consumers to get the latest and greatest lights at an affordable price. The majority of LMT’s products are made in the United States.


authorized retailer

LMT Mercer Group’s mission is to be an industry leader while fostering a customer-focused approach to their designs. New products are developed based on ideas and suggestions from homeowners and builders. Their LED lights use little electricity due to their low voltage design, while their solar lights harness the sun’s energy to burn bright all night.


LMT Mercer Group offers a wide range of budget-friendly and easy-to-install post caps and deck lighting, available here at



Features and Benefits
 Budget Friendly This brand offers products designed with cost-effectiveness in mind.
 Solar Powered Select products use solar power from the sun's rays instead of traditional electricity. Performance varies based on exposure to direct sunlight.
  Easily Customizable This brand offers a wide variety of designs and finishes for expressing your unique style.
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LMT Mercer Group Solar Deck LightingSolar Deck Lighting LMT Mercer Group Low Voltage Deck Lighting Low Voltage Deck Lighting LMT Mercer Group Post CapsPost Caps LMT Mercer Group Lighting Power SuppliesLighting Power Supplies

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