Well, yesterday I got attack of conscience and decide to make something local to improve world power shortage. I rebuild old halogen 12W lamp in my table lamp on modern LED light.
Step 1: Halogen 10W
This was reason which push me to work. I have electric power AC220V and it's transformed to plain AC12V which drive this lamp with 1A...o light and heat with 12 W. Very hot!
Step 2: Heat
You can see what heat of 12W do... plastic is melted. Well light color is warm about 3000K. Its not day light which we like much.
Step 3: Eternal plexi
I took 5mm Plexiglas 120x80mm, drill holes for LED foots. Also I shall rectify AC to DC current.
Step 4: Serial
LED China. 11mm dia. 3.6V and 20mA. Each.And I have 12VDC output.What to do?
I shall connect LED serial !-so 4 leds shall easy hold 14.4V! In my case 12V divide with 4 is 3V. Less. OK.
Step 5: Mirror
I took alchoholic silver paint pen to paint bottom of each led. Do you know why? To increase light in front direction. My moto: keep it simple.
Step 6: Assembled!
White wires are AC12V from transformer. AC is converted in DC with Graetz diodes, full wave, After that is 8 lines of 4 LEDs ...voila!
Step 7: Be light!
Switch on! ...nothing burned...it works! Nothing is warm...even 4 Graetz-diodes (they are 1A) are cold.
Instead 2W I have output 12VX15mAX8=cca 1,5W... or so..
Step 8: And light is on!
I put on back(glued) 6mm sponge. (roll sponge for laying on pool...). YOU can put a tape. Or card paper. Or something else --- what you like. Just for better look and some protection. And
of course: WARNING. Do this on own risk. Not mine.