TN40vn - Should T6vn be scared?!

vinhnguyen54

vinhnguyen54

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I'm no Engineer but couldn't an LED like the XHP35 be manufactured to run on 3v?

Here is my wild guess...most of these high output leds are not designed for flashlights because flashlights is a small non profitable market. These leds were proably intended for other commericial/indistrial applications. For these applications using a high voltage led will reduced the size of the wires thus resulting in more practical and ecominical installation. Since P=IV you will need much larger wires to carry the current if the led voltage drop down to 3V.

The flashlight industry doesnt have a lot of influenece over what type of leds cree should make so they just have to make due with boost drivers. Ie work around the obstacles.

Again in my opinion boost driver is less ideal than back as buck has better regulation due overhead potential difference.

Boost = low Vin high Vout
Buck = high Vin low Vout

In = battery
Out = led
 
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D

drummer132132

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I was going to email vinh some questions about xpg2 in this light but figured I'd pick everyone's brain on here first [emoji4]

What would be the pros/cons in using xpg2 PDT? I was thinking less heat maybe more throw at the sacrifice of lumen. Compare it to xpl PDT. Thanks
 
J

jasaero

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Here is my wild guess...most of these high output leds are not designed for flashlights because flashlights is a small non profitable market. These leds were proably intended for other commericial/indistrial applications. For these applications using a high voltage led will reduced the size of the wires thus resulting in more practical and ecominical installation. Since P=IV you will need much larger wires to carry the current if the led voltage drop down to 3V.

The flashlight industry doesnt have a lot of influenece over what type of leds cree should make so they just have to make due with boost drivers. Ie work around the obstacles.

Again in my opinion buck driver is less ideal than boost as boost has better regulation due overhead potential difference.

Boost = low Vin high Vout
Buck = high Vin low Vout

In = battery
Out = led

Yep...material on Cree site shows architectural spot light concepts as uses for these. And 12v/1a Vout single LED drivers are probably heavily produced and super mass produced and cheap from the lower amperage for said output. Also XHP35 standard can probably use a few in one fixture with higher Vout drivers that are more common with AC in DC out driver. Noticed cree also has 46v specialty LEDs for lighter/cheaper/more efficient higher voltage drivers. Probably again related to starting at 110/220v AC Vin.

Well hope you get something figured out to drive 4 of these without too much headache/expense.
 
J

jasaero

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I was going to email vinh some questions about xpg2 in this light but figured I'd pick everyone's brain on here first [emoji4]

What would be the pros/cons in using xpg2 PDT? I was thinking less heat maybe more throw at the sacrifice of lumen. Compare it to xpl PDT. Thanks

There is an XP-G3 that looks promising now also(more output and more durable)....but not sure on getting a PDT version as it seems to be built different and probably more difficult to dedome. Not sure what XP-G2 does to the petal beam in something with big petal reflectors like this? Might not get as good a focused and solid hotspot outside the focal point distance...but probably hard to say how noticeable that might be. Guessing heat would be better as you say...but not sure I would need full output mode on something like this for long enough to ever become concerned about heat build often. The extreme output flood oriented lights are the sorts I wish had better ability to go full on for extended times. Really wish there were some 10,000+ lumen option that had some sorta active cooling.
 
T

tab665

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I was going to email vinh some questions about xpg2 in this light but figured I'd pick everyone's brain on here first [emoji4]

What would be the pros/cons in using xpg2 PDT? I was thinking less heat maybe more throw at the sacrifice of lumen. Compare it to xpl PDT. Thanks
you would take a hit in lumens, but your still looking at probably over 3,000 lumens. the theory in my mind is that you would get a strong bump in lux, still a lot of lumens, and dimmer spill. the beamshots ive seen so far from the stock light reviews i find the spill to be extremely bright. might be something you like, or might not
 
D

drummer132132

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There is an XP-G3 that looks promising now also(more output and more durable)....but not sure on getting a PDT version as it seems to be built different and probably more difficult to dedome. Not sure what XP-G2 does to the petal beam in something with big petal reflectors like this? Might not get as good a focused and solid hotspot outside the focal point distance...but probably hard to say how noticeable that might be. Guessing heat would be better as you say...but not sure I would need full output mode on something like this for long enough to ever become concerned about heat build often. The extreme output flood oriented lights are the sorts I wish had better ability to go full on for extended times. Really wish there were some 10,000+ lumen option that had some sorta active cooling.

If XPG2 was doable in this light I don't think heat will be an issue at all. My M30Cvn has XPG2 and handles heat extremely well for being a light with way less mass in comparison to the TN40vn though I do not know the difference (if there is any) of drivervn2 vs drivervnx2 if one pushes harder than the other. If I remember correctly Olight might be starting the trend of active cooling in lights. I only mention Olight since I saw a video of them using an internal fan for a light being released later. Not sure if they're the only company currently doing this. Will be interesting to see what becomes the standard in the future for it.

you would take a hit in lumens, but your still looking at probably over 3,000 lumens. the theory in my mind is that you would get a strong bump in lux, still a lot of lumens, and dimmer spill. the beamshots ive seen so far from the stock light reviews i find the spill to be extremely bright. might be something you like, or might not

Yeah I was thinking along the same lines assuming it is feasible. Increase in lux with a decent amount of lumens with reduced spill in comparison to XPL/XML2. Personally I think XPG2 really shines in lights that are smaller than the TK75 or T6. Generates less heat but still provides adequate output and range. If my LD60vn could have used XPG2 I probably would have used them but was not to be. I am however looking forward to drivervnx3, whenever it becomes available, for the thermal regulation. My LD60vn will be my guinea pig before upgrading the rest of my lights.
 
vinhnguyen54

vinhnguyen54

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HD are always brighter than HI...But for some reason All the XHP35 HI I have ever tested are equal to or brighter than all the XHP35 HD...HMMMMM
 
vinhnguyen54

vinhnguyen54

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I also hate how the TN40 battery pack is 2S2P instead of 4S...If I rigged the battery pack to 4S to work with DriverVNXR then the built in charging system will no longer work. And its not like we can just take out the cells and charged then individually. It's a pack...Arghhhh
 
vinhnguyen54

vinhnguyen54

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Soooo Sticking to the original driver and UI and forcing it to work with XHP35 might be the only way. Good thing the original UI is great already.
 
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jasaero

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I also hate how the TN40 battery pack is 2S2P instead of 4S...If I rigged the battery pack to 4S to work with DriverVNXR then the built in charging system will no longer work. And its not like we can just take out the cells and charged then individually. It's a pack...Arghhhh

How sophisticated is the charge circuit? Adapter brick looks to be 8.4v. Any chance charge circuit would just need double voltage supply to charge a series pack? Lotta laptop adapters would be right in the ballpark.
 
vinhnguyen54

vinhnguyen54

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How sophisticated is the charge circuit? Adapter brick looks to be 8.4v. Any chance charge circuit would just need double voltage supply to charge a series pack? Lotta laptop adapters would be right in the ballpark.

Anything an be done as a custom for one. But it also have to be "mass produce-able"

I got this! Hang tight!
 
ProCharger

ProCharger

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I still have faith this light is going to produce some gigantic numbers. It is hard to hang tight :thumbsup:
 
MAD777

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This is one of many reasons that I turn away from any light as soon as I see a proprietary battery pack. Why limit the options?

I know the argument that non-flashaholics want a light they can just plug in, but my rebuttal is that those people shouldn't be playing with lithium-ion flashlights.
 
NICSAK

NICSAK

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This is one of many reasons that I turn away from any light as soon as I see a proprietary battery pack. Why limit the options?

I know the argument that non-flashaholics want a light they can just plug in, but my rebuttal is that those people shouldn't be playing with lithium-ion flashlights.

Agree 100% mad!
 
vinhnguyen54

vinhnguyen54

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T6vn
XPL PDT, Max throw & Neutral ~5000K Tint
$275
ANSI Lumen: 5150
Lux: 405K
Max Throw: 1270m

TN40vn
2*XHP35 HI 5000K + 2*XHP35 HI 6500K + Original Power Boost & battery pack $350

ANSI Lumen: 6300
Lux: 380K
Throw: 1230 Lumen

1,150 More lumen Lumen
25K Less Lux

If I used all XHP35 HI 6500K I might get more lumen and the lux difference will close in

Initial impression:
TN40vn has superior tint
larger hot spot
brighter corona and spill
$75 More but you don't need to buy a charger 4 batteries. These are 3400mAh so they are good to stay.
If you need more runtime back to back you need to buy another battery pack
Overall both are practically the same in terms of price
TN40vn does have superior build quality
T6vn is a bit lighter and more compact


 
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Newlumen

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Thank for the lumen number.. I think i will pass on it since i already have t6vn and mx25l4cvn in the vinh building list. Those of you who doesnt have t6vn or tn40vn should consider either one.
 
MAD777

MAD777

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That makes sense. The TN40 is one ounce heavier, half inch longer, and half inch larger diameter bezel than the T6.
 
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richbuff

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I figure it this way: Some more lumens and more throw and weight than lights in the similar class that have a slightly smaller head diameter.

Less lumens and weight and throw than the RC40vnT, which has the most weight and largest head diameter.

Another very interesting offering in this general size/weight/throw/power class. :)
 

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