I'm looking for a battery operated lamp to use during workshops that has good color balance. 

Many people use OTT lights. I like them well enough for sketching, but not for watercolor work or direct scientific lighting. I don't like the color the OTT puts out, nor the difficulty getting proper scientific lighting.

This lamp was suggested, but I'm not sold on it either.  https://www.barnesandnoble.com/reviews/home-gift-collapsible-led-desk-lamp-reading-light/27433837?ean=9780594572008#reviews-header 

Any suggestions? It has to be cordless.

Thanks for your experience.

Gretchen