Need help designing a basic LED light

[Thomas W]

When you have the circuit running, what is then the [i]actual[/i] voltage [i]measured[/i] across the battery terminals? Or across the connected 12 V adapter output?
What is the current rating in [mA] of the adapter? It's usually printed on the bottom side, or engraved into the plastic.
And what is the battery model number, and rating?

[Mavruss]

The adapter is 12V 200ma
The batteries that I would have used are 9V 250mAh Make: Tenergy

the 24Vdc adapter that im thinking about is 600ma connected to 12 LEDs