Diwali lights: Are some bulbs in your old string of lights not working? Instead of buying new ones, try this trick..

The festival of Diwali is a symbol of light. It is a tradition in many households to decorate balconies, parapets, doorways, and windows with colorful lights and decorative strings (fairy lights). However, it often happens that when we take out the fairy lights—carefully stored away from the previous year—during our Diwali cleaning, we discover that a section of them isn't lighting up, or perhaps the entire string has stopped working.

Most people assume they are completely broken, throw them in the trash, and buy new ones from the market. But did you know that, in many cases, the entire string isn't actually ruined—it might just have a minor fault? With a little bit of know-how and the right approach, you can make your old fairy lights usable again. Let’s look at some simple ways you can fix your Diwali lights at home.

First, understand how the wiring works.
Before attempting to fix the lights, it is important to understand how they function. Typically, the "rice lights" and other decorative strings used in homes consist of many small LEDs connected in series. This simply means that if a wire breaks anywhere in the series, or if even a single bulb fuses, the electrical current cannot flow further, causing the entire string to stop working.

Some higher-end decorative lights contain multiple series. In such cases, if one series fails, the rest of the lights may continue to function. Therefore, the first step is to determine whether the issue is a broken wire or a faulty bulb.

Identify the fault using a needle and a tester
Attach a needle to the tip of an electrical tester.
Turn on the power supply and carefully probe different sections of the wire with the needle.
This will help you determine how far the electrical current is reaching. If the light on your tester stops glowing, it indicates that the wire is broken or an LED is faulty somewhere in that vicinity.

How to identify a single faulty bulb:
Often, the wiring is perfectly fine, but a single blown LED can cause the entire string of lights to stop working.
To check this, you can use a pair of insulated tweezers (those with a plastic coating).
Use the tweezers to touch the two wires of the bulb you suspect is faulty.
If the rest of the string lights up when you do this, you have confirmed that the specific bulb is the culprit. You can then remove that faulty bulb and connect the wires directly together.
(Note: Performing this while the power is on can be dangerous; please exercise extreme caution or wear rubber gloves.)

Making the light string work without a controller box:
Most light strings include a small plastic box—containing a PCB—that manages blinking and color-changing effects. If this box has burnt out or become faulty, you don’t need to discard the entire string. You can identify the correct wires and connect them directly to the plug. However, in this configuration, the lights will remain on in a single, steady mode and will not blink.

Turning 'rice lights' into blinking lights:
'Rice lights' (tiny decorative string lights) typically stay on continuously without blinking. If you want them to blink, you can try a clever, improvised hack: simply connect an old starter—the kind used for fluorescent tube lights—in series with the wiring of the light string. Once done, your simple rice lights will begin to blink fantastically.

Disclaimer: This content has been sourced and edited from Amar Ujala. While we modified it for clarity and presentation, the original content belongs to its respective authors and website. We do not claim ownership of the content.