@ Matt, i think you're right !
Maybe i will try to send this to hyperdyne, i send them my video but they didn't answer.
@ spacewindu, i think you're right about the leds they're not all the same, but for the foam it's hyperdynes one it was with the strip i've received.
I even try some other foam, but not better, the better was 2 wrap of foam but i lost brightness!
The nylon tubing is their too, that's the one they send me.
@ Darthsteve, i already try with an ultraedge, i've got one heavy duelling but when i tryied it, i could see all the leds, not a good solution for me. What is a cling film ?
I'm waiting for the answer of hyperdynelabs.
Thanks to all of you to try helping me this way ;)
I would really like to find a solution, cause i'm in France and to send back to hyperdyne, would be very long time (and sorry for my english i do my best!).