Stabilizes current / voltage for led circuit

[cpl]

Hi.
Inspired to street lighting i have a plan to build by myself for garden.
Please help if i have led circuit 6leds in series
assumed 22.8v or 3.8V/led x 4 paralell
each channel at series added a resistor 6.8 ohm for 350mA (1W)
How to make sure if each series should be stable at 3.8V 350mA.

Just worry if not stable at the series then lifetime affected, because i have several power supply at 25V 3A and havent a plan to buy again.

Thanks
CPL

 

[TexLite]

Series connection would be the best way to insure each emitter operates at 350mA.

For your existing 25V power supply,use this, SLIM Constant Current 350mA Power Supply.

For 230V mains voltage use this, 230V Constant Current Power Supply.

Both reasonably priced.

-Michael


Edit:

Either of the above solutions would power 1 string of 6 series connected LED's, assuming 3.5Vf @ 350mA, for 21V total.

To power 4 parallel strings of 6 series connected LED's from you existing 30V power supply use, SLIM Constant Current 1400mA Power Supply.

-Michael