I ordered the lamps on eBay. The quality is questionable; two out of five stopped working a week after ordering. I got very upset about this and canceled my second order with these lamps. Later, I read feedback from people who received their orders; many complained that they looked unreliable. Now I prefer to order from local stores that give a guarantee on their product. On the advice of a friend, I ordered
LED lights for grow tents to try out, and if everything is as he described, I will buy bulbs for the whole tent.