Hey guys! I plan on flying a strip of LED's at a festival with

Woot! No worries!
I was just getting scared that it was going to break the bank just getting enough helium.

So the airgas guy called back and said they have 2 tanks they can do for $100 each.
Should be enough gas for ~15-20 36" balloons.
Enough to keep me flying for awhile!

Look into something called Hi-Float. It’s a liquid polymer that you apply to the inside of the balloon, and it seals it. So it goes from 12 hours to a week or more.

Awesome!
16-oz bottle OTW.
Is it going to affect weight much?
Going to try to see if i can fly 5m of strip, fishing wire/swivel, and hopefully a silk defuser.

Any other lighter options than silk?

the trade off is worth the slight weight increase, I think.

Just use hydrogen. What could go wrong?