Don't Miss

Powerful LED Replaced

By on October 3, 2018
powerful LED light










how to repair led light

Received a 100 watt LED Outdoor Light for repair with the complaint of dim. Inside the casing there are two powerful LEDs. In order to check the LED, one has to turn the light on and measure the DC supply voltage. If the DC supply is lower than the normal voltage then the LED will be dimmed. If the DC supply check to be good then suspect a bad LED light.

In the below photos, I have tested the DC supply which was 109 Volt and it was a good DC supply voltage to both the LEDs. This means both the LEDs light have problem because it suppose to be super bright once it received the 109 vdc volt.

how to fix led light

how to test and fix led light

Since these LEDs light can’t be repaired, the only solution is to replace with two new LEDs light. I bought it from the local market.

new led lightbulb

Before you fix the LED light make sure you apply lots of heat compound and this can helps to dissipate heat faster.

If you did not apply the heat compound or did not put enough heat compound, the LED light span will be shorter due to overheat-see the two photos below:

led light repair

how to fix and repair led light

Once everything is fixed and powered On, the light produced by the LEDs were super bright.

repairing led light

Conclusion: It is a very straight forward repair because the DC power supply was working and getting the original LED light from the market was not a problem at all. Assuming if the DC supply has no or low output then I will focus on repairing the power supply and it will be different story from this article. All the best to you.


This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.

Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments. If you have electronic repair articles to share with us, please contact us HERE.

P.S-  If you enjoyed reading the above article, click here to subscribe to my blog (free subscription). That way, you’ll never miss a post. You can also forward this website link to your friends and colleagues-thanks!

Note: You may check out his previous post in the below links:




  1. albert van bemmelen

    October 3, 2018 at 2:13 pm

    Very professional repair in which we need to keep our hands and the environment clean! I therefore really dislike those jobs where it involves having to add or remove heat compound from defect parts.
    Recently I fixed the light in our flat´s staircase because the owner-lessor neglected to repair it even after over 6 months of waiting and repeatedly mentioning it. I didn´t have that same TL light so I removed the foot from the original defect 9W TL light and soldered it onto a new smaller 7W lightbulb. But the interesting part is that I also thought I previously had bought a 240V LED lightbulb for that job but it wasn´t. It was just a 12V DC/AC LED lightbulb which I had inserted into that same staircase 240VAC socket but it worked perfectly for at least several minutes! But when I noticed my mistake I quickly removed the still working 190 LUMEN 3Watt MR16 12V LED lightbulb that contained 12 yellow leds that were all still perfectly fine afterwards! And now my 240V 7 Watt energy saving lamp illuminates our staircase in these getting darker days!

  2. Parasuraman S

    October 3, 2018 at 4:34 pm

    Great service!

  3. Henrique J. G. Ulbrich

    October 3, 2018 at 9:40 pm

    Great, Suranga. Thanks for sharing. Quick and effective as always from you. I agree with putting enough quantity of heat compound. This time is not for saving. LEDs concentrate too much heat in a very little area, and this heat must have their way outside eased. There is one thing that I did not fully understand: you said that there were two LEDs. But as a matter of fact there were two sets, each one with an array of LEDs. Is it so?

  4. Beh

    October 3, 2018 at 10:20 pm

    Great repair .

  5. Yogesh Panchal

    October 6, 2018 at 8:20 pm

    Good Job! Suranga


Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.