I accidentally purchased the wrong bulb and I tried to return it to JoAnn's only to find out that they no longer carry the plug in bulbs. (This was a backup bulb and the one in the lamp is still functioning.) They discontinued those bulbs and now carry only the screw in type. JoAnn's would not refund or exchange it. I contacted Ott Lite company and the only thing they would offer was an exchange with a restocking fee of $5. Not only did I have to pay to have it shipped but I also had to pay them to take it back! I will never buy another Ott Lite product. When the bulb in the lamp is no longer functioning, I will convert it to a screw in bulb and buy a competitor's bulb. There are plenty of full spectrum lights available. This was VERY, VERY poor customer service. Do NOT buy Ott Lite. The competitors products are much less expensive and are just at nice.