- Joined
- Jun 17, 2012
- Messages
- 1,584
I love my two HDS Rotary Flashlights. Got some new matching bling for them.
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The BladeForums.com 2024 Traditional Knife is ready to order! See this thread for details: https://www.bladeforums.com/threads/bladeforums-2024-traditional-knife.2003187/
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Flashlights
- Thread starter Need2Know
- Start date
Rubi, you have 2 more HDS than I do but if they ever go on a diet, get more grippy and a tad brighter that will change.
No diet and not more grippy, but noticeable brighter...325 Lumen Rotary HDS in orange cerakote.
Resistance is Futile...
If I get time tonight, I'll try to get some beam shots. The hot spot is almost double in size of the 250, but the spill is very similar. The 325 is actually warmer in tint than the 250.
Here's the bidness end.
325 on top...250 on bottom
If I get time tonight, I'll try to get some beam shots. The hot spot is almost double in size of the 250, but the spill is very similar. The 325 is actually warmer in tint than the 250.
Here's the bidness end.
325 on top...250 on bottom
- Joined
- Dec 19, 2013
- Messages
- 1,226
Luck.....that is a great looking light.....slightly off-topic.....(slightly)......I am confused (as I am likely supposed to be) by Lumens......
The HDS 250 would have 250 Lumens, I am guessing the 325 would have 325 Lumens......but then there is also "Out the Front" lumens which is what the light actually produces......the "actual" brightness.....(???)
As an example.....I recently read a description of a 500 Lumen light with 350 OTF Lumens.......(so why would they claim it is a 500 Lumen light...???) and as I have never had the chance to play with an HDS......I am curious about the actual brightness (is it 250 or 350 Lumens OTF) and useful beam distance.........
If anyone could shed a little light on the matter (groan) it would be appreciated......
- Joined
- Dec 19, 2013
- Messages
- 1,226
Ross- Henry's website is worth visiting if only to read his "white papers". I think you would get a kick out of how detailed he is.
Seriously smart dude when it comes to things that "go bright in the Night".
Rubi......I would LOVE to understand this a bit better....!!!
Who is Henry......directions to website....???
- Joined
- Jan 12, 2011
- Messages
- 5,064
Rubi......I would LOVE to understand this a bit better....!!!
Who is Henry......directions to website....???
Henry is "Da Man". I think of him as the Rick Hinderer of Flashlights. Serious about his craft, knowlegeable about Hard Use illumination.
I can attest, I threw my light about 20ft. onto a pile of rocks (Hard) long story as to why but suffice it to say it involved a fall and the dogs.... anyway. Not a scratch.
They are Great Lights!!
"Articles" are a great read. Also, when the phone rings Henry usually answers, and he always answered my emails.
http://www.hdssystems.com/Content/Home/
- Joined
- Dec 19, 2013
- Messages
- 1,226
The simple answer is that most report LED lumens based on calculated electronic values...higher number looks good for them to the uneducated.
OTF or out the front lumens is measured by a calibrated orb and is a better representation of what we see.
This is a simplistic explanation cause other factors are involved.
Like Mr. Rubi says, Henry has a better explanation on his site.
- Joined
- Apr 29, 2014
- Messages
- 2,343
The initial , advertised measurement is the amperage to led efficiency number.
Its bigger, so it sounds better, so that is what they advertise.
Just like horsepower. They never tell you the power at the wheels because it's a lower number.
By the time the beam makes it out of the reflector, and through the lens, power is lost.
If your looking for useable beam distance, you need to look at lux, measurements. That's the amount of "throw" a light has.
A light with 600,000 lux, will throw a beam 1 mile.
(Tk61vn. = a 1mile light bad mother )
Small lights like yours with tiny reflectors of course would have a small amount of throw.
In a edc light, im less concerned with throw, and more with flood.
The wide area of light. Edc lights are for up close tasks, and you want a nice clean wall of light. Not a small spot of light that you have to scan to see.
Lights with small thin beams are going to be more focused, which will make them throw further.
Like that tk61(deep huge reflector. 1000lm with an xml2 )((a xpg2 would be too small for this huge reflector, and not have enough power)) only has about a 5' spot at ten ft, but it will throw a mile.
A light like a mm15vn( had very shallow wide reflector, 7500lm with 2 mtg2 )
Has an extremely wide area of light, but will not throw far . At ten ft, the entire room is lit. This is the, light up a football field light.
The style of emitter effects this too
A xpg2 is a tiny emitter. It's good for throw, and good for tiny little lights.
(Small focused emitter , huge deep reflector= throw)
The xml2 is an average size emitter, so it's good for all around lights, and has more power than a smaller emitter.
Mtg2 is a monstrous emitter, great for flood. Loads if power
Note there are always exceptions, but this is the general way of looking at it.
Its bigger, so it sounds better, so that is what they advertise.
Just like horsepower. They never tell you the power at the wheels because it's a lower number.
By the time the beam makes it out of the reflector, and through the lens, power is lost.
If your looking for useable beam distance, you need to look at lux, measurements. That's the amount of "throw" a light has.
A light with 600,000 lux, will throw a beam 1 mile.
(Tk61vn. = a 1mile light bad mother )
Small lights like yours with tiny reflectors of course would have a small amount of throw.
In a edc light, im less concerned with throw, and more with flood.
The wide area of light. Edc lights are for up close tasks, and you want a nice clean wall of light. Not a small spot of light that you have to scan to see.
Lights with small thin beams are going to be more focused, which will make them throw further.
Like that tk61(deep huge reflector. 1000lm with an xml2 )((a xpg2 would be too small for this huge reflector, and not have enough power)) only has about a 5' spot at ten ft, but it will throw a mile.
A light like a mm15vn( had very shallow wide reflector, 7500lm with 2 mtg2 )
Has an extremely wide area of light, but will not throw far . At ten ft, the entire room is lit. This is the, light up a football field light.
The style of emitter effects this too
A xpg2 is a tiny emitter. It's good for throw, and good for tiny little lights.
(Small focused emitter , huge deep reflector= throw)
The xml2 is an average size emitter, so it's good for all around lights, and has more power than a smaller emitter.
Mtg2 is a monstrous emitter, great for flood. Loads if power
Note there are always exceptions, but this is the general way of looking at it.
- Joined
- Dec 19, 2013
- Messages
- 1,226
Guys.....thanks for all the help......the information was great and very helpful.......
I think it is fair to say that I still don't understand it all but I certainly have a much better understanding than I did before......gonna let it sink in for a while and then re-read everything........I'll get there eventually.....
I think it is fair to say that I still don't understand it all
but I certainly have a much better understanding than I did before......gonna let it sink in for a while and then re-read everything........I'll get there eventually.....
fq55
Knifemaker / Craftsman / Service Provider
- Joined
- Feb 27, 1999
- Messages
- 2,308
I just purchased my first flashlight in like 8 years. I use a surfire E2e and a G2 with a old led head and a weapon light clicky. It's time for something new.
After a bit of research I ordered a HDS EDC executive 140 gpd that was on clearance. The reviews and pictures really did it in for me and I look forward to getting it in.
After a bit of research I ordered a HDS EDC executive 140 gpd that was on clearance. The reviews and pictures really did it in for me and I look forward to getting it in.
- Joined
- Jan 20, 2014
- Messages
- 324
+1 for the PD35. Bright, durable and small for an 18650 light.
Here are a couple of back-ups to the back-up, AAA and 10440. The copper one (Prometheus) has a pretty slick quick connect. The brass is a Peak Eiger.
