Is that all you are looking for, heck man, aliexpress, amazon all have tons of this cheap and easy with the battery powered RGB source and fiber ready to go.
EL wire is nowhere near as bright, my first costume was EL wire and whilst better than nothing lacked the intensity and complexity I wanted, then came V2 in EL wire, made a lot of effort finding the brightest EL wire and made quite a good complex pattern. But it was hand sewn onto the costume! Took a long time and on the very first night it failed. When you buckle EL wire or its bend radius is too much as happens on a stretchy costume it fails. So lots of time making, probably £300 in parts trying to get the right stuff and it failed first night!
Then came V3, I found corning side emitting fibre, robust, flexible and you can use it like a thread. but it needs FC lasers and they aren’t cheap as stated, especially when you want a few of them. £500 a good few hours making however it did last three nights, finally one length failed when a woman caught her ring in it and the large battery bag fell off and damaged the fibre at the connections!
V4 (2023), I have found a way to make it even more robust whilst keeping the brightness and flexibility but the lasers aren’t cheap, hence my post.
I really appreciate everyone’s help and patience, especially Red Cowboy.
I have found a 100mw RED laser with driver (see picture) but because I'm new to this I don't know if that thread is a standard for lens/holders also if the G2 lens is appropriate for what I want (simply close focus and nothing more I think! Unless someone is going to say “wavelength” for RED,GREEN and BLUE lasers)?
Whilst creating anything I spend more money developing it than the actual final version, this is why I'm asking so many questions to save myself money, as I can't afford £500 just to finally find the end result costing £50.
Yes, as RedCowboy says I can buy the FC lasers complete but that total cost is £250 just for the lasers then 10m of the fibre is £140 excluding all the other electronic bits.
Ideally someone can say "here, use these R,G,B ebay laser, with these lens’s and holder, total £xx get someone to machine a small FC end piece and your sorted”
I can 3D print all the holders for the PCB etc and make the electronics myself.
you start with one thing and end up finding something else. I was looking at that type of thing but the bulky LED unit is the issue. have thats why I went for FC laser as is small and light. 
www.ellumiglow.com
