Does this bulb have a dawn simulation feature? That is, slowly brightening over 15 or 20 minutes to simulate dawn.
1082218
Yes? It sucks. It gets brighter in noticeable hard increments, the first one strong enough to wake you. I had great hopes for this bulb, but it's just an expensive novelty that soon wears off.
1082219
No it doesn't have that feature. But it does strobe during a cellular phone call
1715803
No: You can get from Amazon a sensor that will fit in the light bulb socket that will make it Dawn to Dusk.
1901305
To the eye, it appears that there is no delay at all. I have viewed the brakelights in the reflection of a storefront window via my own mirror and it appears instantaneous on the first illumination. As for the tenth of a second, get real; buy the bloody thing and you'll like it!
375971
No. But they don't seem to take as long to "brighten up" as many other cfls.
131924
If used indoors this CFL gets to full brightness within 5 seconds of turning on. I do have some of these outside and when temperature is below 55oF I noticed that it takes about a minute to bring the bulb up to operating temperature and full brightness.
137226
It is not a dusk to dawn light. It turns on when it senses motion. I installed mine in a dark hallway coming inform the garage. The light comeson and goes off in about 30 seconds or so. Works great.
31865
I dont know about the particular details, but I use it for a few hours so its not worth switching out a bulb for that time.
2190948
It will take a few mins to come to full brightness depending on the temp, but it will start. It has an electronic ballast, only magnetic ballasts hum.
1815133
It takes about ten to fifteen seconds (tops) to warm up for full brightness.
1774876
The bulb comes on in roughly one second. I'm using the bulb (with only one installed of a two bulb fixture ) as a hobby bench light and am very pleased with the brightness level. I had to rewire the fixture by removing the ballast and wiring the120 v directly to the bulb socket but was no major problem.with the whiteness of the emitted light.
1559666
All fluorescent bulbs take time to warm up to reach full brightness, so yes this bulb takes about 3 minutes to warm up. It is a high-quality bulb though and produces very nice white light.
2204686
Pat, the light works with a motion defection sensor and has several time on settings. This is not a light that goes on dawn to dusk type. Settings vary from 1-15 minutes.I hope this helps you. I love this light.
725675
It only allows 2 options. Either 100% light at on time and instant darkness at off time. Or the ramp up feature, 15 minutes to reach full on and 15 to reach full off. Like a sunrise and sunset. Much more natural. But that is all you can so with it gangsta.
1153783
Yes, it has a time delay. It will not instantly power off or on with just a quick flash of lite. Seems like it was about about ten seconds or more from a bight lite.
2049673
Not exactly sure how long mine comes on each night but it does come on, off & on throughout the night, and I have had my first one over a year and have not changed the bulb yet.
1478845
Yes. I use mine on a 3 way incandescent lamp. I have it on the brightest setting and "sunrise" starts as a glow and ramps up to max bright in 30 minutes. The three way will give you more options depending on how you want your sunrise to occur.
1548385
I have these bulbs in a touch lamp. I really didn't notice the delay. There is one, but it is so minimal, it doesn't really make a difference to me. They do the job I bought them for and that is all that counts. Hope this helps.