LEDs powered by main voltage

Did someone tried to put LEDs in series and connect them directly to a wall plug?

Just a rectifier is needed (rated for 400V), a 8000 Ohm resistor (5W), and 50 white LEDs in series. Under 230V AC they would lead 20mA max.
Divide those numbers by ~2 under 110V AC.

A more efficient way would be to make a small set:
3 white LEDs in series, a 330 resistor and a capacitor (in parallel)
then put ~20 of these sets in series and plug to the 230V (or ~10 in 110V AC, don't forget the rectifier).

What do you think?

the led's, current inrush limiting resister and the capacitor to be the actual power resister is exactly whats in most LED nightlights. I've actually built a few circuits like that (adding in a fuse for safety) and if you search the boards here for LED nightlights you'll find that people have actually produced the boards necessary to make them.

Putting a whole bunch in series works just fine too, afterall thats what LED christmas bulb sets are the only thing wrong with that is that they flicker horribly to my eye. I would rather run shorter strings off of a DC power supply.

Thanks for your answer.

I tried a search and couldn't find any post using words "nightlight LED board"
Could someone point me directly to some posts?

Thanks again

Dat2zip has a webpage about how to make the nightlights here .

A good starting point
Bedankt!

i don't like to see the 80% of the energy dissipated by the resistor... i prefer to use something like 50 leds in series and a little resistor-bridgeconverter-capacitor...