Nichia Develops 60 Lumen Per Watt White LED
- Thread starter jtr1962
- Start date
ddrueding
Fixture
I simply want brighter flashlights with longer run time.Other LEDs hold no interest for me.
Do you use them for photography somehow?
Pradeep
Storage? I am Storage!
New York.
Pradeep
Storage? I am Storage!
Are they repelled by the light or does it just tell them their meal is on the other end of the beam?
Some of the higher end SureFires can dazzle a human:
http://www.surefire.com/10x-Dominator
500 lumens for 20 mins.
I'd rather have something more practical. What do you think about the Fenix TK45 R5 flashlight?
No, but I'm nervous.
Stereodude
Not really a
Pradeep
Storage? I am Storage!
Looks impressive. Not sure how the lumens compare to the SureFire. I do know the Surefire incandescent lamps need replacement after a certain amount of runtime, so the LEDs would help in that regard. Plus the initial cost is a little more accessible.
I'd be nervous too.
Pradeep
Storage? I am Storage!
It's a good start. I like this flashlight myself. I'm in the process of building one.
Holy crap, LEDs have certainly come a long way. Did he take those photos with them under driven?
It's a good start. I like this flashlight myself. I'm in the process of building one.
That is far too large for my needs. I like the size of the TK45 at 8 x 1.5". presumably the head is wider than the 1.5" body, but that is fine.
time
Storage? I am Storage!
I was surprised that you thought the old Surefire was impressive. My back of the envelope estimate says about 2000 lumens for that LED flashlight, but Stereodude could give us a more accurate number.
Stereodude
Not really a
Well, the best available luminance bin of SSC P7 LED's are rated for 800-900lm each at 2.8A. That's what I'm using in my triple P7 light. So, a triple P7 will be 2400-2700 emitter lumens at 2.8A. That's closing in on 35W HID territory (2800-3200 lm) though much more broadly distributed.
There's also Luminous Devices SST-50 and SST-90 LEDs. The top SST-50 bin is rated for 1350-1620 Lumen at 5A. The top SST-90 bin is rated for 2700-3240 at 9A. I don't know if the top SST-50 or SST-90 bins are available though.
I've already built a single SSC P7 @ 2.8A 2D Maglite that uses 8AA batteries. I've got the parts to build a 2nd 2D Maglite SSC P7 Maglite that uses 2 26650 LiMN batteries. The triple SSC P7 will use a 4D Maglite host and 4 26650 LiMH batteries. I've got those parts as well. I'm waiting for a potential problem with the multi-mode LED driver to be resolved before I build them out.
The Cree XM LED should yield some interesting flashlights depending on how hard it can be driven. It's expected to deliver 750 lm @ 2A. If it can be driven with higher currents it will be both brighter and more efficient than the SSC P7. It also has a smaller die than the quad die in the P7 so it will throw better.
Stereodude
Not really a
With the battery configuration I'm using (4 x 26650 LiMN), the 3 LED version (based on calculations) would be somewhere between 90-120 minutes.
Howell
Storage? I am Storage!
After a week they will either be spoiled or not spoiled
I don't want to know what they would have to do to them to get them to last longer than a week. Nor would I want to ingest it.
Howell
Storage? I am Storage!
I think I just had a Ralph Wiggam experience.
Stereodude
Not really a
Pradeep
Storage? I am Storage!
Frankly when flying with a powerful flashlight I would be taking the batteries out. Presumably the LED high power devices will overheat when accidentally turned on in the tight confines of a suitcase etc. I know with even a seemingly low power SureFire 6P with the high lumen incandescent lamp, I was always scared the thing would cause a meltdown.
:scratch:
Stereodude
Not really a
It's spelled Ralph Wiggum and this should explain it.
Stereodude
Not really a
Here are all the rules and regulations on Lithium and Lithium Ion batteries and air travel.
You're not allowed to carry spare Lithium or Lithium Ion batteries in checked luggage, but you can put devices with Lithium or Lithium Ion batteries installed in them in your checked luggage as long as the devices are packed in such a way they can't be turned on.
I know the name, but miss the relevance to the fruit issues.
Presumably there is no good way to preserve bananas other than cooking or dehydration. I assume that somebody tried gamma and sealed foil/film.
:smurf:
Those don't fit into the larger category?
A problem I've had is the laptop. I could swear that they were not allowed in luggage for some reason.
Stereodude
Not really a
I think it has to do with the fact that he said something really obvious like Ralph Wiggum would say.
Stereodude
Not really a
Well, there are some additional restrictions.
- Lithium metal batteries are non-rechargeable batteries you discard once they are depleted. Larger lithium metal batteries contain over 2 grams of lithium, and are forbidden.
- Most consumer lithium metal batteries such as AA, AAA, and CR-123A sizes, do not fall into the "Larger" category. Just follow the Basic rules.
- "Larger" lithium ion batteries are rated between 100 and 300 watt-hours (8-25g equivalent lithium content, or ELC.)
- You are allowed one larger lithium ion battery installed in a device, plus up to 2 spare larger lithium ion batteries. These are in addition to any smaller lithium ion batteries.
- For smaller lithium ion batteries, just follow the Basic rules.
- Lithium ion batteries rated over 300 watt-hours (25g ELC) are forbidden.
Stereodude
Not really a
well, you shouldn't put anything in your checked baggage that you don't want stolen. A laptop is certainly a good example of this. If I recall correctly the airline is only liable for up to $3300 for domestic US flights. International flights are $640 at the rate of $9.07 per lb.
On top of that airlines have lovely disclaimers like:
On top of that TSA approved luggage locks are a joke. I have read that one trick is to pack your valuables in a locked hard case with a firearms receiver. You don't need a whole gun, just the unloaded receiver. TSA regulations dictate that it be locked (with a real lock). Of course this only works if firearms are legal where you are going. So, probably not a good option for international travel.
I try to keep the luggage value at <$5K, but sometimes it is closer to $10K. A notebook is not very valuable compared to even a tripod, which I check all the time.
To me, the TSA lock simply indicates if the luggage has been searched. Even a much heavier lock can be cut easily. I bought a small lock cutter once to remove a luggage lock and there was little resistance, like cutting wire with dikes.
Maybe I should go ahead and check in flashlights.
To me, the TSA lock simply indicates if the luggage has been searched. Even a much heavier lock can be cut easily. I bought a small lock cutter once to remove a luggage lock and there was little resistance, like cutting wire with dikes.
Maybe I should go ahead and check in flashlights.
Howell
Storage? I am Storage!
Oops, yes thanks. Ralph embodies the non-sequitur though I'm not sure if returning to a topic within the same thread really counts as non-sequitur. Don't we only have about 6 threads around here.
How much light is needed to see in adjusted conditions, for example awakening in the dark of night? Would the 18 lumen setting on the zebralight be enough to see the zipper to the toilet?
ddrueding
Fixture
Yes, 18 lumens would be fine for that. I just use the LED screen of the cellphone, and that is considerably less than 18 lumens.
Board ate my link. :evil: This is not a good day.
http://www.zebralight.com/H501-Headlamp-AA-Flood-w-new-UI_p_11.html
http://www.zebralight.com/H501-Headlamp-AA-Flood-w-new-UI_p_11.html
I love this little light. It weighs practically nothing and is not much larger than the battery. At full brightness the light becomes rather warm after a while. The middle power mode is fine in a dark room. Even the 3.3 lumens mode produces enough light to make one's way about in total darkness.
It weighs practically nothing and is not much larger than the battery. At full brightness the light becomes rather warm after a while. The middle power mode is fine in a dark room. Even the 3.3 lumens mode produces enough light to make one's way about in total darkness.
ddrueding
Fixture
ddrueding
Fixture
Someone was asking me for my opinion without additional information, so judging it based on what it is (weight, power, cost) does it look like a decent light? Is there something with those rough specs that performs better or costs considerably less?
timwhit
Hairy Aussie
€575 for a flashlight? Seems a bit ridiculous to me. What is something like that even used for?