How many Christmas lights can I run together?

Most people are asking this question before purchasing Mini Lights or LED Christmas Light Strings.

So this answer will relate only to those products like Mini Lights or LED String lights.

The answer depends on the set of lights you are considering and is based on the wattage rating of the strand of lights.

Each string of lights that you see on our website should have a maximum connectivity specification listed.  That’s the number of strings that you can one together end-to-end.

If you exceed the maximum connectivity specification, you’ll blow the fuse contained in or more of the plugs of the strings of lights or you’ll “smoke” your light strings.  In other words, blow out many of the bulbs and render your set of lights beyond repair.

For many years, the Underwriter’s Laboratory stuck by a hard and fast rule of no more than 3 sets in series but as lighting has changed, so has it’s recommendations.

The current UL guideline for maximum connectivity is based on a maximum total series run wattage of 210 watts.   (That means that if a light set were rated at 21 watts, you could run 10 sets of them in series.)

We’ve made every effort to list the maximum connectivity for each set of string lights on our website.  If you happen to find a strand missing that specification, please contact us via our Contact Page and we’ll be happy to assist you.

Hope this answer help.  Ultimately, any electrical questions about your specific lighting project must be directed to a master electrician.


Join the Family!

Our weekly newsletter features helpful technical and shopping tips.

You don’t want to miss that, do you?

Christmas (or the next party) is always around the corner!


Shipping Policy

Shipping exception notice: We are closed for 4th of July week. Orders placed now will ship the week of July 11, 2022.

We are currently shipping Monday - Thursday with most orders shipping the same or next business/shipping day. 

Once an order is placed it is put immediately into a shipping queue, this means we cannot cancel or modify your order once completed. If you have ordered incorrectly, you can return any uninstalled items that have been shipped to you. See our Shipping, Warranty, and Returns page for more information.

To Prevent Delays

Please double-check the address. Include a correct phone number to be used only if there is an issue with the order.  We do not ship to PO Boxes. Orders with PO Box addressing will be delayed while the customer is contacted and the address is corrected.

To prevent delays: Confirm the wire color of all items. Confirm that bulbs and cords match (for example, C7 with C7, C9 with C9, E12 bulb with E12 cord). Confirm SPT rating of cords and plugs match.

Delivery Timeframe Notices Regarding Air Orders (Excluding Holidays)

Orders placed via ground service should arrive in 1-5 business days depending on your zip code. This estimate does not include weekends or major Holidays.  

2-Day air orders shipped on Thursday do not arrive Saturday but should arrive the following Monday. Next-Day orders shipped on Friday do not arrive Saturday but should arrive the following Monday. No orders are delivered on the weekend and the weekend does not count as days in transit.

Due to these unprecedented times and high shipping volumes, UPS and FedEx do not guarantee the day and time of any method of shipping, including 2-Day and Next Day Air Service.

To ensure prompt shipping verify that your order is correct. Please do the following checks:

1. Confirm bulb bases and cord sockets match. 
2. Confirm 18 AWG wire SPT rating matches the SPT rating of plugs.
3. For bulk C7/C9 bulbs and cords orders, don't forget gilbert plugs, if required.
4. Double-check the wire color on all strings lights.