The output of the UK eLed series are :
C8 ~ 5.6W; C4 ~ 4.6W ~ There is no big difference between them.
But, stay inside 5W, U get the double life of the 5W LED.
For me, I made the adapters to change the AA battery to suit for those D & C size batteries.
For example :
D8 ~ 32 AAs
D4 ~ 16 AAs
C8 ~ 16 AAs
C4 ~ 8 AAs
Night Rider D5 ~ 15AAs
Then I can run all my rechargable Ni-Mh AA batteries on all my electrical toys.
In C4 eLed , I can instead the 4 Cs with 8 AAs inside the C4, .........and make them in the same series, then I get the 8*1.2V Voltage => same bright as the output of the C8......................
Same bright, almost 5 Hrs burning time, and free AAs exchanging between all Ur other electrical toys.
With the likely adapter, I can instead the 8 Cs with 16 AAs, .........8 series, 2 bands in parallel.
With the 2500mAh, 1.2V AA, U get 5,000mAh, same Voltage.
More power means longer burning time, and the price of AA is farther cheaper than the price of C's or D's.
But, how should anyone need the 8.5 hrs burning time ?
U have to come back to exchage Ur tank during the normal diving, right ?
(Of course, if anyone need the longer burning time, he can turn the C8 to C4, ..............
4 series, with 4 bands in parallel ~ and get the illumination that extending to almost 17 Hrs .)
misfit