About how long does it take for them to get to full lumens. in other words, what's the warm up period?
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.
816267
I don't feel that there is any delay, and I've been using it for sometime now. Hope this helps.
816268
There is no warm up time, this light bulb works immediately. I would purchase again.
1446629
At least 4-5 hours, but it actually depends on the sunlight they get during the day. On a stormy day with little sun only gives a couple hours light. I've never checked on them in the wee hours to see if they are still lit. Hope this is helpful.
1699242
The fact they are LED they will not draw as much electricity as a luminescent. With fresh batteries I have had the lights on for 4 hours. The next time I used them for two hours with no dimness of the lights.
607663
Not sure of Lumens, but when fully charged it is very bright. Lasts at least 12 hours but starts to dim
367882
A few hours. I have yet to read of anyone who has gotten more light. It works long on first use only, then very short battery life.
1815133
It takes about ten to fifteen seconds (tops) to warm up for full brightness.
974864
Yes there is a momentary delay. When they come on they are full brightness. They do not have to warm up.
428002
If they are given a good half hour charge before the lights are turned out, they glow for very long time. Upwards of an hour and a half to two hours.
87162
Depends on the bulb you use... comes with warm white 845 lumens, but can change to somewhat dimmer or brighter.
2279664
Not enough. Its not the lumens you have to be concerned with but the fall off for distance. These produce very nice light but they are better for fill in on bottoms and middle of plants. Only hps and ml gives real source light. Sure, you could string up 20-30 in a small space, but at that point, your not saving any wattage and your bulb replacement cost is prohibitive. They last about 2-4 months. Check out some of the setups on utube. Good luck Bonnie.
410702
Not really sure about the actual "recharge time". The balls glow via something similar to 'day glow paint', so I'm guessing they'll start glow again from 5 to 20 minutes after re exposure to light. But the longer they are exposed, the brighter and longer they will glow--so, an hour or two works best for me.
1547432
Depends on your light (LED vs Incasescent), the lumens, and use... Could range from 180+ hours with a 15-20 lumen LED to just 2-3 hours with a 120 lumen incandescent. Check out the lumens factory message board for more details...
577223
it puts out an initial 16,000 lumens. but the light fades very quickly. the good news is that there's no heat generated from the bulbs, so they can be close to the plants. I recommend about 2-3 inches away (no further) from the foliage. I will also add that I was skeptical about fluorescent lighting systems entirely, until it tried these. I am impressed. just keep them close to the plants. (-:
1647648
My best guess is 4 to 6 weeks. A lot depends on frequency and brightness which for me is important.
963084
I'm not sure, but if you search through other Q&As; (which you should always do before asking a question), another person answered your question with this: "About 12 hours, at which time the lights begin to grow dim." So I'd go with that. (Of course, we're talking about a fresh set of batteries; older, previously used batteries, may last much less time.)
1006736
Not sure how fast it warms up. However, the brightness depends If you have a projector or just regular head lights. Don't forget this is 35w so the brightness is just average. If you're aiming for the brighter once that puts out more power you can go with 50w ballast.
2195824
I have five of them at my place. They go on when the sun sets with a low level of illumination, but go bright whenever anything passes within their sphere of activation, and then the light stays on for about two minutes. The duration is not adjustable as far as i know.They do what is expected of them.