Glo Toob FX color choice

[arokdad]

Hey All, I need some advice.
Will start my AOW soon and need a marker. I like the Blo Toob FX but his has several color choices: white, red, blue, yello, green.
Is any color preferred over the others to keep me in sight while deep? For instance, I don't understand how blue would be effective. But that's why I'm looking for some assistance on SB.

Thanks!

 

[lucca brassi]

All colours are almost unvisible at larger distance of few meters (Blo Toob FX - better as keypendant )). Better choice is chemical stick .
Best colours for underwater use are below yellow ; like green , blue , violet all with short wavelenghth that it is not so absorbed in water as long wavelenghth like red for example!

Buy better prime lamp and backup !