This is the wrong tool, but it feels so right

[xiphmont]

The little handheld spectrometer I've been using for LED and color matching work, aside from being something of a toy, is intended for lighting applications, that is, for very bright light (e.g., it's rated to be pointed directly into the sun) with a wide field of view. Screen evaluation requires low light sensitivity in a narrow field.

Sometimes two pounds of optical glass is easier and cheaper* than the 'right' tool.

*$19 for two 3" condenser lenses from Anchor Optics. Anchor is awesome.