How to Change Fuses on LED Lights

Finding strands of Christmas lights that won’t light up can be one of the most frustrating parts of decorating for the holidays. If you have a strand of LED lights that you just can’t get working again, the problem might be with the fuse. Here are 7 quick and easy steps to replacing the fuses in your LED lights and getting your holiday decorating back on track.

Important Note: Always unplug your Christmas lights before attempting to examine or change a fuse.

Step By Step: Fuse Replacement

End of Light Strand1. Find the replacement fuses attached to the female end of your light strand.
2. The fuse compartment will then be on the male end of your light strand. Take the male end of the strand and press down with your fingernail or a flat screwdriver, pushing forward towards the prongs.
LED Light Fuse Replacement Step 33. The top will slide open revealing two fuses.
LED Light Fuse Replacement Step 44. Remove both fuses. The fuses may just gently fall into your hand, if not, you should try gently tapping the plug against your hand. If that doesn’t work, you may need to carefully pry them out using a small screwdriver.
LED Light Fuse Replacement Step 55. Insert the new fuses that were found in Step 1.
LED Light Fuse Replacement Step 66. Slide the little fuse compartment door closed.
LED Light Fuse Replacement Step 77. You are now ready to enjoy your light strand once again.

Once you have all of you strands working, you can resume your holiday decorating.

Another decorating issue that people often run into is, how many lights do you need for a tree? Holiday LEDs has created a guide to help you solve this problem and get your tree looking its best.

  • Start by measuring the height of your tree. You want to measure from the top point of the tree all the way down to the base, ignoring the height of the trunk.
  • Then take that number and use the following chart to figure out how many lights your Christmas tree needs.
Tree Height M5, G12, 5MM, or C6 Bulb Shapes C7 or C9 Bulb Shapes
2′ – 3′ Full 140 – 280 50 – 150
4′ – 5′ Full 280 – 420 150 – 225
6′ – 7′ Slender 210 – 350 150 – 225
6′ – 7′ Full 420 – 630 225 – 325
8′ – 9′ Slender 350 – 490 225 – 325
8′ – 9′ Full 560 – 840 325 – 425
10′ – 11′ Slender 490 – 630 325 – 450
10′ – 11′ Full 700 – 1050 425 – 550
12′ – 14′ Slender 630 – 770 450 – 600
12′ – 14′ Full 840 – 1400 550 – 675
15′ – 17′ Full 1050 – 1610 675 – 800
18′ – 20′ Full 1260 – 1890 800 – 950

M5 lights are the mini lights you may be familiar with. G12 bulbs are raspberry shaped. 5MM (or rice) lights are small but shine brightly at a wide angle. C6 bulbs are strawberry shaped.

C7 and C9 bulbs have the traditional shape you might have grown up with—larger than the strawberry-shaped C6, with the C9 the largest of all.

Now that you have your light strands working and you know what size/shape and how many you need for your tree, you’re ready to decorate!