Do the activity Colors #2 in the manual. This activity,is done at night, and works best if you go outside. If it isn't night right now (or is absolutely pouring rain), go on to the next activity. and come back to this later.

The lights in this building are all the new fluorescent types, that only emit certain colors of light	Cars on a street. There are two street lights, and two kinds of kinds of car headlight.

Here is a table of common spectra
 

In addition to recording your survey of the different kinds of lights you find, you should write a note to yourselves about the experimental problems you may have encountered.
Box:

Why does the diffraction grating work so well outside at night, and so poorly inside with the lights on? Think about this for a minute, and then look at some pictures.