How long does it take for the bulb to reach full brightness? Is it "instant-on"?
301249
Less than 10 secs. It take longer for you to get peripheral devices up and running.
301250
Yes, as it works with a led lamp, it is "instant on". If there really is some delay, it's unnoticeable.
301251
It does not take that long pretty quick. But do get a nice tripod stand with it.
552655
Takes about 30 seconds to reach "full" light. It was too "bright white" to suit us, and we ordered different bulbs for a warm white (more like the old incandescent bulbs).
908904
unperceivable, I would need my oscilloscope and photo detector to measure it. In other-words when you flick the switch the bulb is on at full brightness, no waiting, no warm-up time.
1992729
No it comes on rather quickly and bright. I use one in my basement and one in a upstairs bathroom.
1006737
I've never timed it, but I've never noticed a long lag in them warming up, so I'd say not long at all. I haven't had onex, but these are extremely bright. Bright enough that I'm sure it bothers people who get my lights in their eyes. The only thing that matters to me, is how long these last. I had to replace my first ones (not maxlux) after 6 months. I've had these for a couple years already.
2080628
Unfortunately i didn't end up keeping this bulb. I bought 3 different ones and the one i picked was from g7. What i found with all of them was there was a short delay with start up its nothing be worried about.its hardly noticeable and is about 1/2 second.
235589
From my own experience, it depends on the bulb. Some brands can rise gracefully from 0% to 100% with no issues, but some brands (such as Feit) have issues when there are multiple on the same switch and some will light before others until about 20% power is reached. I've had a positive experience with the Philips LEDs, which start out at about 15-20% brightness, and Greenlite, which rise synchronously and beautifully from 0%.
1731296
It comes on/off automatically. The lamp is a 4-LED device; hence, the illumination is very dim. It is convenient however in that you can install it anywhere where you can clip it on.
1422110
I don't remember. It's been quite a while since I bought it. Full brightness is achieved immediately on this bulb.
1039285
More than 2 hours actually. I left mine unplugged running at max brightness overnight to see how long the battery will last. I was up for more than 5 hours before falling asleep and it was still running. Light at max wasn't as bright compared to when it was plugged in though. There's most likely a circuit preventing the battery from over discharging as it turns on then off for some time still before I plugged it back in.
611786
No it doesn't. Push the push button switch to turn on and hold down until it dims to desired brightness. It is very bright when first turned on.
716959
My experience is instant on. These bulbs come on instantly to full intensity even on the coldest nights, -20f.
1815133
It takes about ten to fifteen seconds (tops) to warm up for full brightness.
375968
Just like someone else mentioned, they come on almost instantly (there's a fraction of a second delay), but it does take maybe 10 seconds or so before they reach their maximum brightness. The color of the light is definitely closer to that of an incandescent bulb than a lot of other fluorescents, but is still not exactly like the light that you'd get from an incandescent bulb.
1919212
Should not matter but normally I turn it on and don't turn it off right away. It does come on quite bright.
1195713
I didn't notice any delay. They usually come on instantly with full light, but please also ask seller.
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!