The FT50 C-UV can evaluate luminescences over the entire range of visible light, and ignores gloss and flutter. It is able to reliable detect the fluorescent mark even when it is faint.
The LUT9 is the standard for the millwork industry. It is fast enough to signal a mark for the optimizer, and sensitive enough to not false trip on the natural fluorescence of the wood. The bar graph display and push-button teach make set up easy.