I use a full spectrum florescent light bulbs (called daylight) instead of a plant ‘gro’ light for the shop lights I use in my light boxes to start my seedlings. Full spectrum lights were originally designed for people who get SAD (Seasonal affective disorder, also known as winter depression or winter blues and live and work under regular florescent lights. Full spectrum lights are a little more expensive than regular cool white florescent lights, but cheaper than the ‘gro lights’ marketed to the gardener and provide basically the same lighting as a ‘gro light’. You can get them at the hardware stores. One thing, be sure to buy a high lumen output bulb (6500k), not the energy saver bulbs that are more common now. They produce less “leggy” seedlings.