Reduce 6 Vdc to 4.5 Vdc

e:

in rates. So if you want to increase battery life beyond belief, the thing to do is wire the LEDs in series and then use a "boost" converter to step-u p the 6V voltage to 24-30 V as required.

n gets you back up to the battery current you started with, plus more due t o convertor losses. You dont gain a thing.

Since the output current is as small as possible with the step-up, the conv erter losses are next to nothing, and certainly far less than a series resi stor in a non-switching current limiter.

ote:

rain rates. So if you want to increase battery life beyond belief, the thin g to do is wire the LEDs in series and then use a "boost" converter to step

-up the 6V voltage to 24-30 V as required.

the

ion gets you back up to the battery current you started with, plus more due to convertor losses. You dont gain a thing.

nverter losses are next to nothing, and certainly far less than a series re sistor in a non-switching current limiter.

Obviously switching has an advantage over linear, as well as downsides. If you go for switching, the question is what topology & why. At this point we don't know how the LEDs are wired up inside the fittings, they may well al ready be in series parallel strings that dont share the same current rating .

NT