Simple Homemade Lightbulb




About: I'm a 14 year old boy from India. I love making things and am an avid reader. I make instructables for you all to learn something new and useful!

Why did I make this?

Every year the cost of electricity rises. Many a times, there are long power cuts in the rural areas too. The poor cannot afford tubelights and their homes are filled with darkness. This lightbulb was invented by a poor man in the Philippines, and I was very inspired by him.

This is mainly to be used in rural and/or poor homes.

It uses no electricity, just simple household items and takes only a few minutes to make.

Moreover, it produces the light of a 60-watt bulb!

Keep in mind, a hole has to be made in the ceiling so choose where you want to put this before beginning.

So what are you waiting for, let's get started!

Step 1: Materials

All you need is :

1) Clean soda plastic bottle (Sticker removed)

2) Water (Preferably distilled)

3) Bleach *I forgot to take a pic*

Optional :

A funnel to pour the liquids

For fixing :

1) A scrap asbestos sheet *not pictured*(Or any other metal sheet)

2) Rubber sealant *not pictured

That's it!

Step 2: Spreading the Light

The water is used to spread the light over a large area.

Fill the bottle almost till the top. (Not too much! We need some space for the bleach.)

Step 3: Adding the Bleach

Add two or three teaspoons of bleach to the water and screw the cap on.

This helps prevent growth of algae in the bottle. (Ewwww.....)

Step 4: Fixing It

For this part you need to find a suitable place in the ceiling.

Make a hole in the asbestos sheet the diameter of the bottle. Push it halfway through, and use rubber sealant fix it in place. Then, fix the asbestos sheet in the ceiling

Step 5: The Finished Product

Sorry for the lack of pictures but-

The end result is an amazing cheap bulb which :

a) Gives light equivalent to a 60-watt bulb.

b) Lasts for 5 years or more.

c) Requires no maintenance.

The downside is that you can only use it during daytime :( (You can still use it in an attic or any dark space)

Thanks for seeing this instructable and favourite. Also, any suggestions will be welcome :)

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    6 Discussions


    5 years ago on Introduction

    I hope comments are read by others before trying this. Asbestos is an extremely dangerous substance and while yes, it is still around, the responsibility of posting is to ensure people know and understand any risks that go with any projects. Mesothelioma is a very real cancer. It's sad folks still live in conditions where they are exposed to such dangers.

    1 reply

    Reply 5 years ago

    It is not necessary to use asbestos, any other scrap metal sheet can be used as well


    5 years ago on Introduction

    making holes in asbestos sheet can be pretty bad for your health......

    i.e. lung cancer in 20 years or so.....

    I'd try and avoid asbestos if I were you.......

    1 reply

    Reply 5 years ago

    You can wear a mask while cutting the sheet. Also, it doesn't have to be asbestos, any other scrap sheet will work


    5 years ago

    This is more of a sky light window then a light bulb. it's a great idea but check with your local building code before doing this. it would be awful if you did this and the bottle froze and burst in the winter.

    1 reply

    Reply 5 years ago on Introduction

    True, but as I mentioned this is mostly for rural/poor homes (they have houses made of asbestos sheets). I live in India and here winters are not extremely cold (In the USA it might be very cold) so there is not much risk of it freezing up ;) Thanks for commenting :)