Does this exist?
I seem to come across either a dual scale refractometer, or a single scale refrac with an LED light built in.
IMO, dual-scale is limited in use since any presence of alcohol will require you to correct the reading, therefore the SG scale is only useful for your OG.
I've got and LED-illuminated one for my fishtank . It's cool to have the LED, but completely unnecessary. And, the battery will die eventually (mine's dead and I don't care).
Thanks for the replies. I may just pull the trigger on the dual scale.
Checkout www.nisSales.com, they have the LED dual scale unit. Type "wort" in the search box and several models pop up. Www.rsg-100atc.com has one for $23.00!