Are these "Instant on" or do they take a little while to warm up?
1195713
I didn't notice any delay. They usually come on instantly with full light, but please also ask seller.
1195714
They will be dim when ya first turn them on, they need about 30 seconds to 1 minute to reach full brightness
217180
Yes, my bulbs were instant on. That is until one stopped coming on for good.
2284101
There is a warm-up time for any type of fluro device. However it is just a minute or two before full illumination starts.As to cold weather, I run porch lights with these and they have experienced -24F here in TN!
2205406
They sure do! Plug and play. There's a paper tab you pull out from the where the on/off switch is and then when that's done, they'll be ready to use.
1006740
The warm up is seconds & they will be as bright as your bulbs allow. They are good durable ballasts.
1384592
There is a light that indicates that a unit is on, not that the rollers are ready.It takes 5 minutes to warm them up, super fast I find. If I want more definition I leave them on 10 to 15 minutes. Best.
816266
New CFLs turn on within a second with no noticeable warm-up period. Rest at times it depends on the ambient temperature. In my case, it achieve its full brightness in almost no time.
2284099
They are not bad. I have had some 13 watts bulbs come on faster.. but it is not like it takes a minute before you see bright light. I do not know on cold weather. I have not tried these outside. I usually leave my outside cfl on 24/7 in cold weather, because they die out more quickly if you turn them off and on all the time in the cold.
375966
We've had them for a while now with no hiccups. They turn on without any flashing. Like all CFLs they take a few seconds to reach max brightness but no big deal.
301250
Yes, as it works with a led lamp, it is "instant on". If there really is some delay, it's unnoticeable.
1693675
No, no turn on or off - you just plug them in and they heat up, unplug to shut off.
797144
They are on timers. They go off 4 hours after you turn them on, they are amazing!!!!
974864
Yes there is a momentary delay. When they come on they are full brightness. They do not have to warm up.
594208
I put them in late at night and have checked in the morning and they are still warm. I would say a good 12 - 14 hrs at least. Usually I have replaced them by then to make it through another night. Use them as warmers for strays in my neighborhood.
702293
No, they go to one temperature. They get pretty hot after just a few minutes so if you just want them warm, I'd say leave them in for about one-two minutes. Hope that helps!
689773
It's "instant on", but, like all fluorescent lights, it will take a minute or two to obtain full brightness. The colder the temperature, the longer it will take. Note that the narrow base can be a great advantage in fixtures with limited space.
762931
Mine stay warm about 1 hour if I use them indoors and about 30-45 minutes if I use them outside in the cold.