I already owned 3, bought 3 more. they stack very compactly when not in use/off season storage. (keep the light's box to store the light and reflector safely in.) The lights are Very Bright. and though they get a little warm, they don't get hot. and they sit securely in the groove on top of the nanodome. I have three other 7" domes to cover seedling flats, but I like these the best. They are super clear, and the vents are nice.Update: I bought the first three from outside Amazon loved them, so bought more here on Amazon. I was shipped damaged items (the outer boxes were fine but the inner boxes and products were damaged and had obviously been returned at least once. They were also not as originally packaged. The product itself is a very good product, but the seller needs to be scrutinized closely for reliability and care in shipping something made of thin plastic-- should be shipped like glass. carefully. and NOT ship out damaged goods. I returned the damaged items (2 of three ordered) and reordered 2 more from my original vendor who packed originally packaged items carefully for shipment-- Ali's organic.Update 2: Amazon fulfillment center was responsible for shipping the damaged boxes/products. the following was from the company that I ordered the minigreenhouses from--""Sorry to hear that Amazon shipped you 2 damaged mini greenhouses when we put them on sale last week, but I see they refunded you already from our account. They are responsible for shipping and for ensuring that any items we sent to them for fulfillment arrived in good shape and are not sent on damaged to our Customers. If they arrive damaged at the Amazon fulfillment Center, they are supposed to be set aside as unfulfillable and make a UPS insurance claim, which they apparently didn't do.""