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Picture of How to make cheap but very powerful LED bulbs
It's been almost a year since I started to "LEDify" my home, with results more or less encouraging, but only an accident made ​​me find the best solution so far.

 
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Step 1: Motivation

Picture of Motivation
How often happened that you or someone in your family, by mistake, to overthrow the desk lamp? If you are like me, this has happened many times...  For this reason, the last time my offspring slammed my desk lamp one more time, with an innocent "UUPS!", I exclaimed Enough!

Warning! CFL bulbs contains a small quantity of mercury and this is a very toxic substance.
If by accident or intentional, you have broken an CFL bulb, it is advised to ventilate the room as good as possible, in order to dissipate the toxic vapours.


I decided that I have to replace the CFL bulb from the desk lamp, with something more shock resistant...

But that could withstand the treatment of a 10 years child and at the same time to make enough light to work at desk in good condition, to be reliable in operation and decently priced? If only a few years ago, there was no a solution to this question, the answer is now clear: a power LED.

Step 2: Materials

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As I already had some Cree MX6 Q5 LEDs with 3W power and maximum light output of 278 lumens used in some older projects, I decided to use them for this project too. The LED will be placed on a 5cm x 5cm heat sink recovered from the chipset of an old computer motherboard.

For simplicity, I decided to use a switching power supply of a mobile phone, perhaps together with an electronic adapter that would give me the necessary voltage and current to power the LED. For this purpose I have chosen the power supply of a defective mobile phone Siemens A52 having, according to the manufacturer, an output voltage of 5V and a current of 420mA.

An socket from am old CFL bulb should protect all the electronics.
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HamedH1 month ago

hi

you say about heating problem but i give my another product such this to my friends for long time may be 4 years ago and he was use it in bedroom in room temperature for long time approximate all along nights and he wont told any problem for its performance and yet it work fun and just led chip show a little decrease in brightness that every one cant not be recognized it with his eyes however experts may found it but it work.

tudurache (author)  HamedH1 month ago

Great! It is sturdier than I thought :)

tudurache (author) 1 month ago

Ah... the lamp shape is great, because of the cover it won't hurt your eyes if you look directly to it. However you have in the same closed enclosure, both the LED which produce a lot of heat and the power supply which is affected by the heat (it contains sensitive electronics). If you only use this bulb for short periods of time (in the fridge) it should be ok. Otherwise you might have an overheating problem.

HamedH2 months ago

hi

excuse me tudurache i want you just to say about my lamp bulb shape because i create it with my own idea!

hamedshh2 months ago

hi

how many concession you give me for for my innovation while you see my hand made products for it size and shape in pecent?

tudurache (author)  hamedshh2 months ago

I didn't really understand your question... sorry

hamedshh2 months ago

hey dudes

i made 1 watt led for my refrigerator i use chines 1 watt driver and one chines 1 watt led (market JBZ) with an old broke corrupted "sleep-light color change" body that have ultra low bright and my new handmade that it produce 90 lumen that enough to bright in classic 12 foot refrigerator just consume 1 watt and work for long time may be 20 year ,can u develop such this for 1000 - 2000 lumen output in just consume less than 15 watt?

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tudurache (author)  hamedshh2 months ago
Hi,

It'a a bit too much for such a small body... maybe one or more strings of leds connected in series powered by a capacitive reactance power supply (it won't produce any heat). It will not be isolated from mains power supply but you could do the job...
hamedshh2 months ago

h..

yes i found why my comments are empty.....

i read cree led components and i see if use new cree led X LAMP- XP-L to get more brightness and have more efficacy due to developed chip and newer technology it give 200 lumen per watt in 350 m.A meant that lamp get 600-800 lumen flux

and may be grow project to have more bright and less consume

cree in leader in led worldwide another is Phillips and other have play less role in this industrial and they have competition to try new lumen per watt integer and almost ones win the match if in today we see cree is ahead!

tudurache (author)  hamedshh2 months ago
Hi,

Yes, Cree realy makes great products, a bit expensive but worth every penny... In my ligting projects, the overheating is by far the most vrequent cause of failure, but with Cree leds having such a good efficiency, the heat is not a problem.

Regards
hamedshh4 months ago
hamedshh hamedshh2 months ago

why you try to remove my comments?

tudurache (author)  hamedshh2 months ago
Huh??? I guess only the owner of a comment can remove it's own comment... and the admin (instructables employee) if you break the "be nice" policy...
And believe me... even if I could to do so, I have better things to do...

Peace
anishm22 months ago

a fab idea and replacement to CFL's in very cheap price.

Hi Great project, I really like the lamp cover you used in the bathroom version. Just curious - did you make that painting/pattern or find it somewhere (if found...where?)?

Thanks!!!

tudurache (author)  prototyping_science5 months ago
I'm glad you liked the project.
The lamp cover (together with the lamp itself) that I have used was bought from one of the local stores here in Romania (Dedeman: http://dedeman.ro/) but you might find something similar in other places...
VikasM tudurache3 months ago

for LED LIGHT & LED HOUSING OR COVER pls go on

www.crmplastics.com

Mr. Vikas Malwa

email id:- crmplastics@gmail.com

contact no.:- +918059997770

interesanta idee! totusi nu se incalzesc prea tare radiatoarele alea mici de chipseturi?...

tudurache (author)  Timofte Andrei3 months ago
Cu radiatoarele de chipseturi nu am avut probleme, oricum LED-ul e alimentat la sub 2.5W si la puterea asta temperatura nu trece de 60 grade. Deja de am de mai bine de 2 ani si merg fara probleme. Mai degraba alimentatorul telefonului pare sa fie sensibil la caldura... am niste becuri cu leduri chinezesti de 10W la care mi-au crapat alimentatoarele. Radiatorul desi e de CPU incalzeste si alimentatoarele si asta le cam afecteaza... e vorba de proiectul de aici: http://www.schematics.ro/Projects/LedLighting6.aspx
randy.agosto4 months ago
Is there any diagram of your design for us to uderstand more easily?thank you sir.

Cut the phone end of your mobile charger. Solder the red wire with the + terminal of LED. And respectively the black wire to the - (negative) terminal.

Connect the phone charger to power socket and enjoy the illumination.

tudurache (author)  randy.agosto4 months ago
Well... it's not realy a diagram... only the LED and the phone charger... connect "positive" from the LED with the "positive" from the phone charger, and the same with "negative". No other component is required :)
TonyT44 months ago
hamedshh4 months ago
N2OShot4 months ago

Bravo tudurache and thank you for sharing.

Rajeshs44 months ago

CAN WE MAKE LED IN OUR HOME IT SELF

MarkS135 months ago

Thank you for taking the time to make your website available in english.

PuttarajuR7 months ago

As i have 1W LEDs with me, can i connect 3 Leds a charger as parallel line. Pl reply.

tudurache (author)  PuttarajuR6 months ago
It's not recommended because the LEDs could be slightly different in parameters and the current will not be evenly divided between the three LEDs. However if you have to do this, you could connect in series with each LED a 2.2ohm/1W resistor.
dudes8 months ago
Dude, you have got to look into LED drivers, they are really quite cheap, more compact, and safer for the LEDs.
tudurache (author)  dudes8 months ago
Dude, it's all about recicling... if I can use that I already have, then why spending money for LED drivers?
I doubt that those are more compact and safer than a phone charger... I know many dudes that keep them powered for years and none of them caught fire or even broken.
And they certainly are more expensive than a regular phone charger. If you already own a phone charger (cost is 0), the LED driver shoud be more expensive by... you count how many times...
Mine already works for 3 years and I didn't have any problems so far...
dudes tudurache7 months ago
If you already have a phone charger then absolutely use it. But as for the LED drivers being bigger and more expensive, that little circuit on the heatsink in the first picture is the driver I bought. They are definitely smaller, and I got it for about a buck, so around the same price for a low-end phone charger. However, I did not mean to put down your 'ible, in fact I actually love the idea. And made one myself, pictures 2+3. And I use it a lot. So great idea, and great result, but for those of us who don't have a bunch of phone chartered laying around, LED drivers are an idea.
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tudurache (author)  dudes7 months ago

You're right, if you don't already have a spare phone charger instead of buying one, it's better to buy an dedicated LED driver. But almost anyone has some spare phone chargers, and using them saves the money and the environment.

Hi Tudurache

I love your work and ideas! Recycling from old electronic parts is genius. I have a quick query, do you think it would be possible to power up to 15 Watts worth of LEDs? I have many 14 W 2D lights that have failed drivers in them, I don't know which component within the driver has failed and really want to be able to replace or repair them. Any ideas??

aboelkasem9 months ago

Good afternoon for all bodies

It's a nice project I will to make this lamp

Thank you for all

MooMeat4211 months ago
personally I find the color of the Q5 LED to be much too green without much blue to even it out. But then again I have blue CFLs for the main source of light in my room
nice bulbs.
zubain11 months ago

Its an awesome idea to use the cell phone chargers to directly power the LEDs without using wasteful resistors. Can you please advise the best configuration using 1 W LEDs. Do you think that I can directly connect 2 x 1 W LEDs in parallel to a cell phone charger?

tudurache (author)  zubain11 months ago

1W LEDs requires about 300mA but phone chargers generates usually more than 700mA... so connecting 3 or better 4 * 1W LEDs in parallel should work, but in order to equalize the LEDs characteristics it's recommended to connect in series with each LED a small value resistor... about 0.5 Ohm or 1 Ohm (1W) should be ok.

aarenz1 year ago

Not sure about LED's and electronics but was wondering what it would take to have substantial power supply central place in a house and wire all led lights around house. Would love to remove most outlets and replace with USB connectors to power charging and LED based lighting. You are saying something about the maximum output of the power supply burning out the LED if it is over the rated level for the bulb.

tudurache (author)  aarenz1 year ago

It could be done, but you'll still need a constant current source, for each LED bulb, and this could be more expensive than a phone power supply that you probably already have lying around.

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