question about LED lights

[scottransell]

I have a bar light that the bulbs burned out. It had E11 bulbs with .1watt each with a 2 batties with double AA in it to run. I am looking at changing this up to install a power supply into it, with six E11 bulbs with .1 watts each and will be in series so they all work togehter with a switch to turn on/off.
Now will a power supply 24V DC 5A 120W work to run this as I am thinking it should be good. but don't want to over/under value it, want to ensure before ripping it all a part to find out I need something different. Also should I put a resitor in line as well and what size would be required. Apprciate the help here.

 

[Togalonn]

Power supply: A 24V DC 5A 120W power supply is more than sufficient to run six 0.1-watt E11 bulbs.
Resistor: If the rated voltage of the bulbs matches the power supply (24V), no resistor is needed; if not, you can add an appropriate resistor based on the above calculations.
Switch: Choose a small switch suitable for low current (25mA).

 

[brianmoooore]

A 24V DC 5A 120W power supply is more than sufficient to run six 0.1-watt E11 bulbs.

That's a bit of an understatement, to say the least. It would run over a thousand of them.

 

[littlespark]

The original lights are battery?
You said each has 2 x AA … so is that 3V

You also say “in series” so that’s an 18V supply

Would it be easier to source an off-the-shelf 3V supply, connect them in parallel…. Then if one fails, they don’t all go out.

They are also DC… so you need to get the polarity right on them all.