tips on how to choose underwater clamps &arms for your strobes and lights?

As many of divers don't know how to perfectly equip their underwater photo equipments for their strobes and lights ,here are tips for your reference .

if you are the first time or not familar with shooting under the water  , take a compact digital camera housing .this ligthweight package easily to carry and handle under the sea .  when you operate the housing with no difficult , adding more video photo gears on underwater camera, like scuba lamps, Inon or Sea &Sea strobes and wet lens kits.   

but how to choose the clams and arms when using srobes in your hands?  

1, get two arms on each side .we suggest 8 inch arm and 4 inch arm with 3 two holes ball joint clamps. but why should need  two sizes of arms ? it is necessary to adjust the strobe  in different positions when you are shooting macro ,fish ,or wide angle. with 2 arms built up,you can use the strobe flexibly .

2,  adding a second underwater strobe if you can afford it. 

3, don't be afraid to experiment underwater-get a good understanding of exposure,lighting,hot spots and backscatter