add lights to your graphing calculator. Do it now. [Sil3ntP8nd8] added some, as well as seems to have done a respectable job. They are spread around the back, supplying a good even light on, well, on whatever is under your calculator. It may be challenging to see as well much detail though on account of the water marks. You have to safeguard your intellectual residential or commercial property though. This practically compares to the DS LED monstrosity we covered recently.