Reply to Clip-On Light for Traktor S4?

I played my first gig (ever!) last evening at what is a weekly spot at a local establishment - it went really well, thankfully, and I'm even more excited now. My biggest realizations were that I may need a monitor to better hear my 'moves' and transitions, and also, that I was struggling to see the mixer as much as I'd wished.

Are there any product recommendations regarding a small and possibly clip on light to connect to the S4 to help visually?

Thanks for any help,
David