C9 Custom Length Commercial Grade String Lights, No Plug (C9/E17/intermediate base)

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2 color options
  • Commercial Grade C9 based string lights sockets
  • Commercial Grade C9 based string lights - black - custom length
  • Commercial Grade C9 based string lights - white - custom length
  • c9 e17 intermediate socket dimensions
  • Black C9 Commercial String Light Cord feature
Frequently bought together:


This C9 commerical grade string light cord can be custom cut in a variety of lengths for any project! Suitable for permanent outdoor installations, these heavy-duty string light cords look professional and will last and last.

Note: Longest single length is 264 sockets (330 feet). For single or mutliple lengths totalling close to this or longer, consider a full 330 foot Bulk Reel.

Custom orders typically ship in 1-2 weeks. If your order is time sensitive, contact us for current availability.

  • For use with C9 bulbs (sold separately).
  • 15" spacing between sockets. 
  • These stringers are sold by the socket. To calculate quantity needed, divide length (feet) by 1.25 (see examples on Footage Calculator tab).
  • Longer lead or tail wire not available. There is 7.5 inches of wire at either end of the strands.
  • These strands DO NOT come with a plug. They are intended to be hard-wired to a power source.
  • Bulbs must be faced downward.
  • Maximum run is 1200 watts. Max load for each socket is 10 watts.
  • Using 7 watt bulbs, max run is 171 sockets (213 ft.) Using 10 watt bulbs, max run is 120 sockets (150 ft.). If used with LED bulbs, the entire reel of 264 sockets can be used on one run.
  • If one bulb burns out, the rest stay lit.
  • Manufactured with 16-gauge wire and high-quality sockets.
  • PVC socket forms a tight weatherproof seal around the bulb.
  • Indoor or outdoor use. Suitable for permanent, outdoor installation. You must keep a bulb in every socket to maintain weatherproof quality.
  • Installation Instructions


Below is the formula to figure out the quantity of sockets to order for the length you need (in feet). Once you have added the TOTAL number of sockets needed in the shopping cart, indicate the details of the strand(s) you need in special instructions box above. See examples below.

Total length needed ÷ 1.25 = Quantity of sockets to order*

Feet Needed Sockets to Order Price
25' 20 $50.00
50' 40 $100.00
100' 80 $200.00

Add the TOTAL number of sockets needed in the shopping cart, then indicate in the instructions box above the details of each strand length needed. See examples below.

Sockets Ordered Details in Special Instructions Yields
60 3 strands: 20 sockets each Three 25 ft strands
214 1 strand=150 sockets; 2 strands=32 sockets each One 120 ft. strand and two 40 ft. strands

*If your answer is not a whole number, round up to the nearest whole number. For example: If you need 53 feet of lights, you would order 43 sockets (53÷1.25=42.4, round up to 43)

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Additional Information

Socket Size:
Cord Grade:
Socket Style:
Cord Color:
Cord Length:
Custom length
Socket Spacing:
15 inches
Cord Color:
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5 Reviews

  • 5
    Professional Result

    Posted by Mark Trump on Aug 14th 2021

    I could not be happier with the result of these strands in custom lengths. I was able to run perfectly sized strands from points off the roof of my house without having to hide extra cord or sockets. A truly permanent commercial install.

  • 4

    Posted by Charles Brown on May 31st 2021

    I needed a longer pigtail on one end. <<Response from PartyLights.com>>We wish this was an option we could offer, but are limited to half the length of the socket spacing since we cut exactly between two sockets from a large reel. This information is detailed in the detailed description of the item.

  • 1
    Not clear that there was no plug

    Posted by Matt Culhane on May 23rd 2020

    Why wouldn’t I want a plug? Now I have to figure out how to attach plugs on either end. You should make that clearer when ordering. >>> Response from PartyLights.com <<< Hi Matt! We're sorry you’ve had a bad experience. We have the term “no plug” written into the title and product description of anything we sell without a plug. If you would like to return the lights for a refund, let us know.

  • 5
    String Lights

    Posted by Melanie Corcoran on May 16th 2020

    Fantastic product. Exactly as described - high quality and beautiful. Wonderful customer service, as well. I highly recommend this company and their products.

  • 5
    Custom Length String Lights

    Posted by John on Mar 23rd 2020

    Very happy with the quality. Wanted the custom length for around my dock. Also allows for different bulbs. Lots of choices.

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