I've always had a scientific brain, and had a general understanding of the science behind my lamp & my products, but over the last year, I've done a lot more research. There is a ton of misinformation out there, so I want to share with you:
1. LED is still a form of UV. Don't be fooled by a salon tech who tells you "Oh, we don't use UV; we use LED". That is either an uneducated tech or a complete lie -- and that is not a place you should continue to go. If she doesn't know this simple fact (or worse, is lying to you about it), what else could (s)he not know or be lying to you about?!?
2. One LED lamp may not cure all LED-curable gel/gel polish. In very simple terms, LED is a finely-calibrated wavelength within the UV spectrum. While one UV lamp will cure multiple brands due to the wider wavelengths & some bleed-over, LED won't work that way.
3. You can find more information directly from a leading industry scientist -- Doug Schoon. One article, in particular, can be found here. Doug's website, as well as his FB page, are chock full of information. If you wish to be educated, please "friend" him, and sign up for his eblasts.