Turtle Light 2 Using The "Pro Series" LED
- Thread starter Doug
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The_LED_Museum
*Retired*
I'd do it, but I don't have the 4-cell bulb.
I tried this but was not thrilled with the effect. The bulb sits too far forward. The normally very nice beam of the Turtle II is not replicated with the Pro bulb unless you make it so the bulb is a fair bit farther back. I couldn't see any way off the top of my head to situate it in that position without major work (if then).
Also I thought there would be a thermal issue since the bulb is not in a metal holder, ala Maglite?
Note, I do think the LS + the Turtlelite II reflector would make a very good pair if they could be properly spaced.
-john
Also I thought there would be a thermal issue since the bulb is not in a metal holder, ala Maglite?
Note, I do think the LS + the Turtlelite II reflector would make a very good pair if they could be properly spaced.
-john
The_LED_Museum
*Retired*
How about adding spacer rings, like the kind that used to come with Magnum Star bulbs?
Ok, ok, I tried it.
Quite frankly, I hadn't thought about the use of the spacer in this way.
I created a space that is 3-3.5mm (not perfectly even).
And... It works!
The beam is pretty good.
The beam is enlarged by aprox. 70% while still retaining a nice beam. It's still a fair amount more narrow than the TL II normal beam, but of course it's brighter.
I took some pictures which gives the rough idea, although I cannot fix the shutter speed and the target is a textured white celling, so take them with a grain of salt.
I'm not going to get them uploaded tonight as I think I left the cable at the office.
So, what about the heat issues?
Anyone want to take a stab at runtime?
-john
Quite frankly, I hadn't thought about the use of the spacer in this way.
I created a space that is 3-3.5mm (not perfectly even).
And... It works!
The beam is pretty good.
The beam is enlarged by aprox. 70% while still retaining a nice beam. It's still a fair amount more narrow than the TL II normal beam, but of course it's brighter.
I took some pictures which gives the rough idea, although I cannot fix the shutter speed and the target is a textured white celling, so take them with a grain of salt.
I'm not going to get them uploaded tonight as I think I left the cable at the office.
So, what about the heat issues?
Anyone want to take a stab at runtime?
-john
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by John N:
Anyone want to take a stab at runtime?<HR></BLOCKQUOTE>
Ok, I'm going to take a stab at this. What do you think?
Assumptions:
2LED Bulb (98-4) like used in the TurtleLite II indicates the following runtime: 150hrs w/4D.
ProBulb (PS3-3) lists 100 Hrs w/ 3D.
D cell is 18,000 mAh
AA cell is 2,850 mAh
Ok, let's take a look:
98-4: 4 x 18,000 = 150 hrs, or 72,000 mAh for 150 hrs. That is 480 mAh per hour.
PS3-3: 3 x 18,000 = 100 hrs, or 54,000 mAh = 100 hrs, or 540 mAh per hour.
Four AA batteries = 11,400 mAH.
That means the 98-4 should give 23.75 hrs with four AA batteries.
The PS3-3 should give 21.1 hours on four AA batteries (I know, the PS3-4 is the correct item, but they don't give runtime for it).
Summary:
23.75 hrs vs. 21.1 Sounds reasonable to me. Afer all there are two LEDs vs the one LS. Seems about fair.
However, the Turtlelite II lists a 65 hour runtime. Where I calculate 23.75. Hmm.
Anyone have any thoughts or observations?
Thanks,
-john
Anyone want to take a stab at runtime?<HR></BLOCKQUOTE>
Ok, I'm going to take a stab at this. What do you think?
Assumptions:
2LED Bulb (98-4) like used in the TurtleLite II indicates the following runtime: 150hrs w/4D.
ProBulb (PS3-3) lists 100 Hrs w/ 3D.
D cell is 18,000 mAh
AA cell is 2,850 mAh
Ok, let's take a look:
98-4: 4 x 18,000 = 150 hrs, or 72,000 mAh for 150 hrs. That is 480 mAh per hour.
PS3-3: 3 x 18,000 = 100 hrs, or 54,000 mAh = 100 hrs, or 540 mAh per hour.
Four AA batteries = 11,400 mAH.
That means the 98-4 should give 23.75 hrs with four AA batteries.
The PS3-3 should give 21.1 hours on four AA batteries (I know, the PS3-4 is the correct item, but they don't give runtime for it).
Summary:
23.75 hrs vs. 21.1 Sounds reasonable to me. Afer all there are two LEDs vs the one LS. Seems about fair.
However, the Turtlelite II lists a 65 hour runtime. Where I calculate 23.75. Hmm.
Anyone have any thoughts or observations?
Thanks,
-john
John,
Thanks! Now, could you do a side by side comparison of the 2 LED bulb, and the Pro bulb in the T2? I bet you only have 1 T2, eh?
Also, what camara did you use? What program did you use to make up the nice pag lay out, with the various picture resolutions? Thanks.
Doug
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by John N:
Ok, here you go: click
Note there is no manual settings on the camera so you need to take the brightness with a grain of salt.
-john<HR></BLOCKQUOTE>
Thanks! Now, could you do a side by side comparison of the 2 LED bulb, and the Pro bulb in the T2? I bet you only have 1 T2, eh?
Also, what camara did you use? What program did you use to make up the nice pag lay out, with the various picture resolutions? Thanks.
Doug
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by John N:
Ok, here you go: click
Note there is no manual settings on the camera so you need to take the brightness with a grain of salt.
-john<HR></BLOCKQUOTE>
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Doug:
could you do a side by side comparison of the 2 LED bulb, and the Pro bulb in the T2? I bet you only have 1 T2, eh?<HR></BLOCKQUOTE>
Actually I have another T2, but I have to "borrow" it out of my wife's car. I'll try to do this later.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Doug:
Also, what camara did you use? What program did you use to make up the nice pag lay out, with the various picture resolutions? Thanks.<HR></BLOCKQUOTE>
It's a Toshiba PDR-M4. The camera itself is OK, it was a pretty good price/performance, but if I could get something now I would look at the Nikon 885, Cannon G1, or Olympus 3040Z. The pictures were took at high resolution but not the highest quality.
I then used a program called IrfanView to batch convert the images to smaller sizes.
Then I used Netscape 6.2 to lay out the page as you see it. I did the layout by hand but cheated and used Netscape instead of just editing the HTML (getting lazy you know).
Basically, I just started with a table, added the images, comments and then links for the other images. Nothing complicated, just somewhat tedious.
-john
could you do a side by side comparison of the 2 LED bulb, and the Pro bulb in the T2? I bet you only have 1 T2, eh?<HR></BLOCKQUOTE>
Actually I have another T2, but I have to "borrow" it out of my wife's car. I'll try to do this later.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Doug:
Also, what camara did you use? What program did you use to make up the nice pag lay out, with the various picture resolutions? Thanks.<HR></BLOCKQUOTE>
It's a Toshiba PDR-M4. The camera itself is OK, it was a pretty good price/performance, but if I could get something now I would look at the Nikon 885, Cannon G1, or Olympus 3040Z. The pictures were took at high resolution but not the highest quality.
I then used a program called IrfanView to batch convert the images to smaller sizes.
Then I used Netscape 6.2 to lay out the page as you see it. I did the layout by hand but cheated and used Netscape instead of just editing the HTML (getting lazy you know).
Basically, I just started with a table, added the images, comments and then links for the other images. Nothing complicated, just somewhat tedious.
-john
Ok, I updated the page with a the dueling Turtlelite IIs. ProBulb vs. the 2LED bulb.
Interestingly, the 2LED has a brighter hotspot, however the Probulb has a larger hotspot.
The Pro is much whiter.
The 2LED has a much more even taper-off (although you might be able to effect this a bit with the spacer).The Pro bulb is brighter at the cutoff point.
All in all these are not vastly different.
-john
Interestingly, the 2LED has a brighter hotspot, however the Probulb has a larger hotspot.
The Pro is much whiter.
The 2LED has a much more even taper-off (although you might be able to effect this a bit with the spacer).The Pro bulb is brighter at the cutoff point.
All in all these are not vastly different.
-john
Hey, John.
Great Photos.
However, I was wondering what do you mean by "Maglite Probulb"?
Is that a Mag 4D with the probulb?
I was trying to read the earlier posts to see if I missed something, but there seems to be no mention of it.
Anyway, thanks.
Great Photos.
However, I was wondering what do you mean by "Maglite Probulb"?
Is that a Mag 4D with the probulb?
I was trying to read the earlier posts to see if I missed something, but there seems to be no mention of it.
Anyway, thanks.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by kenshiro:
However, I was wondering what do you mean by "Maglite Probulb"?
Is that a Mag 4D with the probulb?<HR></BLOCKQUOTE>
Sorry, I should have explained.
Pretty close - It's actually a Maglite 2D, but with 3V Lithium D cells (and the LEDCorp Probulb 4-cell version). (Maglite + Probulb)
Should be about the same as a Maglite 4D.
-john
However, I was wondering what do you mean by "Maglite Probulb"?
Is that a Mag 4D with the probulb?<HR></BLOCKQUOTE>
Sorry, I should have explained.
Pretty close - It's actually a Maglite 2D, but with 3V Lithium D cells (and the LEDCorp Probulb 4-cell version). (Maglite + Probulb)
Should be about the same as a Maglite 4D.
-john
John,
I guess I am a little confused, are you saying that the picture of the "2LED Bulb (L), Probulb (R)" is correct, the brighter one IS the 2LED?! I understand, when you say that the hotspot is wider for the Pro... hmm... perhaps a little focusing would help ... but thanks for the pictures
!
Doug
I guess I am a little confused, are you saying that the picture of the "2LED Bulb (L), Probulb (R)" is correct, the brighter one IS the 2LED?! I understand, when you say that the hotspot is wider for the Pro... hmm... perhaps a little focusing would help ... but thanks for the pictures
Doug
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Doug:
are you saying that the picture of the "2LED Bulb (L), Probulb (R)" is correct, the brighter one IS the 2LED?!<HR></BLOCKQUOTE>
From the looks of things, right at the center it is, then as you move outward the Probulb is brighter.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Doug:
I understand, when you say that the hotspot is wider for the Pro... hmm... perhaps a little focusing would help ... but thanks for the pictures
!<HR></BLOCKQUOTE>
I suspect that is kind of the heart of the matter. I think the reflector on the TL II compliments the normal focusing of the LED packaging.
Since the Probulb doesn't have any focusing aspect to it, you only get what the reflector provides.
It's interesting to see what a vast difference the TL II reflector and the Maglite reflector make.
The Maglite is very focused and the resulting beam is very bright, but it stinks if you don't want a spot light. If you look at the first couple of shots, the ones of the Probulb with and without the spacer, I think you get an idea of what type of focusing is possible with this reflector and the Probulb. I don't think you are going to get a much better beam.
My conclusions: The TL II works pretty darn well in it's original form. The TL II + Probulb suffers a bit in beam formation, but it is much whiter and somewhat brighter (just not at the very center), however, the TL II + Probulb is better IMO than a 2-3D Maglite with or without the Probulb.
What we really need here is a C or D cell Arc LS.... Hint, hint...
-john
are you saying that the picture of the "2LED Bulb (L), Probulb (R)" is correct, the brighter one IS the 2LED?!<HR></BLOCKQUOTE>
From the looks of things, right at the center it is, then as you move outward the Probulb is brighter.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Doug:
I understand, when you say that the hotspot is wider for the Pro... hmm... perhaps a little focusing would help ... but thanks for the pictures
I suspect that is kind of the heart of the matter. I think the reflector on the TL II compliments the normal focusing of the LED packaging.
Since the Probulb doesn't have any focusing aspect to it, you only get what the reflector provides.
It's interesting to see what a vast difference the TL II reflector and the Maglite reflector make.
The Maglite is very focused and the resulting beam is very bright, but it stinks if you don't want a spot light. If you look at the first couple of shots, the ones of the Probulb with and without the spacer, I think you get an idea of what type of focusing is possible with this reflector and the Probulb. I don't think you are going to get a much better beam.
My conclusions: The TL II works pretty darn well in it's original form. The TL II + Probulb suffers a bit in beam formation, but it is much whiter and somewhat brighter (just not at the very center), however, the TL II + Probulb is better IMO than a 2-3D Maglite with or without the Probulb.
What we really need here is a C or D cell Arc LS.... Hint, hint...
-john
