Q: I’m replacing many of the light bulbs in our home with the newer, energy-efficient LED bulbs that appear to be replacing old, ordinary bulbs and fluorescent lights. Can LED bulbs be used to start seedlings indoors and to grow plants? – Dan Frankheiser, Alexandria, Minn. A: Shopping for light bulbs used to be so easy. Browsing the light bulb shelves now is a major task. Like you, we’re also switching to LED bulbs, because for example a 60-watt equivalent LED bulb uses only about 6 watts, which greatly reduces the electric bill. A comparison of the brightness, listed as lumens on the package label, can be used to make sure the LED bulbs are providing similar light as older-style incandescent bulbs. Can LED lights be used to grow plants indoors? I did some checking and found that LED lights have been researched by universities like Purdue. They are being promoted for successful plant growth in commercial greenhouses for supplemental lighting. In addition to being energy efficient, LED bulbs produce less heat and can be safely located closer to plants. Commercial growers were cautioned to choose bulbs that emit blue and red light wavelengths, which are present i...