These lamps look very good with quality parts and attention to detail (unlike the lamps that came with my lamps). The packaging is also well thought out and well packaged. One of the best "Made in China" products I've seen. Excellent price. Especially since my local hardware store chain only sells one bulb for almost the same price as these 6 packs (thankfully they only sell "cold" white). I only tried 3 of the 6 bulbs, but they lit up straight away, and all were the same brightness with each other. The light color (3000k) is an extremely "warm" orange-yellow. It's almost too warm for me, but still way better than the horrible "day" (hospital) white I had before. UPDATE 8/4/18: One of the lightbulbs just stopped working for no apparent reason. And they only tuned in about 8 times for about an hour per session. This brand is not very reliable, so I'll stick with big brands next time.