Hi,
I agree that a 12v battery is better for this project because there is less power loss using white LEDs.
For 12v we can use three white LEDs in serie per string which leaves only 1.5v, while using a 6v battery we would have an overhead of 2.5v which is not only more but in relation to the 3.5v LED it's a lot more percentage loss.
A switching regulator could be used but it would probably be a waste of time if the voltages are matched as well as they are with a 12v battery. With a 6v battery if for some reason that was all that was available, a switching regulator would make more sense.
Ron:
Yes my post must have reached ET just seconds before yours (back a bit in this thread).
I agree that a 12v battery is better for this project because there is less power loss using white LEDs.
For 12v we can use three white LEDs in serie per string which leaves only 1.5v, while using a 6v battery we would have an overhead of 2.5v which is not only more but in relation to the 3.5v LED it's a lot more percentage loss.
A switching regulator could be used but it would probably be a waste of time if the voltages are matched as well as they are with a 12v battery. With a 6v battery if for some reason that was all that was available, a switching regulator would make more sense.
Ron:
Yes my post must have reached ET just seconds before yours (back a bit in this thread).