Mount the light so you can lower it to within 2-3 inches from the top of the plants. At 75-80 degrees, seeds will germinate quickly and seedling emergence will be more uniform. After the seeds germinate, move them to the cooler, light location for 4-5 weeks. The week before you are ready to set them out, move the plants outside during the day to acclimate them to outside conditions. Carefully read the information on the package of seed-starting potting mix that you purchase.
Some mixes have a light 'charge' of nutrients included while others have none.
If there are nutrients in the mix, you won't have to use supplemental fertilizer until 3-4 weeks in the growing process. Make sure that you don't over water seedling plants. Wait until the surface of the mix is dry before adding more. This and other questions like it, are undoubtably on the minds of many vegetable gardeners as they make plans for this year's garden. Advertisements prey on the gardener's weakness of always wanting to try something new.