woohoo is right. I had no idea that Brainwave generator was capable of doing this.

Here are some simple steps to setting up Brainwave generator to flash like a strobe light during the night at the times you specify.

1) Select Options, then select Full Screen
2) Select Options, Visual Color Options
2) Put a checkmark in the Override Visual Color Options Of Individual Presets
3) Click on the 1st color and select Modify color
4) Set this first color to black as this will be the color your screen will start with and remain with until it begins cycling through the colors, which will leave your computer screen dark until the flashing begins.
5) Keep the second color as is
6) Select Add and select something like a bright red for the third color
7) Select Add and select something like a bright yellow for the fourth color
8. Add any other colors you wish or change any of the above you wish except for the first one.
9) Click OK
10) Open the properties box
11) Click on the Visual tab
12) Take the X out of the track another parameter if one is in there
13) Select the Visual Brightness dropdown box and select Full brightness
14) Set the first 60 or 90 minutes, however it long it takes you to start dreaming to 0.
14) Set the remaining part of the preset for whatever and whenever you want the flashing to take place. In my early experiments today it seemed like 20 produces a good flash.
15) Test the preset by changing the length to 1 and watching it, then change it back before actually using it.
16) If you want to set up a strobe light without any of the binarual beat sounds, just set the Sound Volume on the Sound tab to Zero Volume.
16) Under the Options menu there is also an option for using External Goggles (AudioStrobe) for anyone who wants to try this with goggles.

Not sure if these features are available in an unregistered version, but it would seem well worth the price of $40 to have a registered version for all of this.