One things you gotta watch in the "ASA Equivalent" figure for the camera. ASA Equivalent refers to the comparable image quality if you were to use a regular film camera - thus a digital cam with an ASA equivalent of 100 would be like using a regular camera with 100-speed film. Make sense?
Highest ASA equivalent I have seen on a digicam is around 500.
ASA 100 will REQUIRE full sunlight for a good picture.
ASA 200 will work with full sunlight, indirect sunlight, or bright artificial light.
ASA 400 is for full sunlight, indirect sunlight, all artificial light (that you can see DETAIL by) and shady and overcast days. ASA 400 is a good number for general purpose work, or "workbench pictures" of projects under workbench lighting. ASA 200 will do OK, but detial may be lacking due to light insensitivity of the film.
I have an ASA 100 equivalent, and it is nearly useless for most of hte pix I hneed to take - and that is when I learned of the ASA equivalent figure...
FFZ