If you want a fall crop of vegetables that need to be harvested before the first freeze, the answer is to start your seeds indoors and then plant seedlings when the soil is cool enough for the plant to thrive (think tomatoes). Here is how I made an easy affordable seed growing rack.
Indoor Grow Lights: Two new and better choices, T8 and T5 bulbs, are now available. Old-line T12 fluorescent bulbs are still cheap and easy to find, but T8 bulbs, are up to 40 percent more efficient. Plants get plenty of light when grown within 2 inches beneath T8 bulbs.