Update: After about 2 weeks these lamps have a bad twilight sensor. At 9am in full Texas daylight, the bulb stays on until at least 10am! So annoying. Then, when the weather is just cloudy, it turns on. πThe twilight sensor is not sensitive enough. It's 8:00 am Texan summer, it's as bright as noon on the patio, and those lights are still on! turns on so quickly too. Go with another brand is my suggestion. It's too cheap and not worth the time and money to send it back. On the other hand, the brightness is actually quite good and I like the color temperature output. Too bad the sensor isn't very accurate.