SunwayLED        
Results 1 to 15 of 15

Thread: 7 led / halogen

  1. #1
    Flashaholic* yclo's Avatar
    Join Date
    Oct 2001
    Location
    Melbourne, Australia
    Posts
    2,258

    Default 7 led / halogen

    Has anyone seen/used this before?


  2. #2
    *Retired* The_LED_Museum's Avatar
    Join Date
    Aug 2000
    Location
    Federal Way WA. USA
    Posts
    19,418

    Default Re: 7 led / halogen

    No, but I'd rather see those LEDs go all the way around the perimeter, instead of just an arc of them across the upper edge.
    It might be a real winner if they did that.

    I presume they did it this way to avoid any possibility of having the dreaded "doughnut" beam at very short range when the LEDs are used, but there are ways around that.

  3. #3

    Default Re: 7 led / halogen

    Pretty hefty price price @ $195.00 on this web page (about 2/3 down the page).
    That e-tailer states the following "The robust Speleo Technics 4.7Ah battery will power the LEDs for over 32 hours, the halogen spot for 5 hours!"
    My interest in LED torches has skyrocketed.
    I am currently researching equipment for a med-evac and contingency plan.

  4. #4
    Flashaholic* yclo's Avatar
    Join Date
    Oct 2001
    Location
    Melbourne, Australia
    Posts
    2,258

    Default Re: 7 led / halogen

    I think I remember seeing a similar one (cheapo version of course) for about AUS$40 (US$~20), only has 3 leds and uses 3 AAA that is mounted right behind the reflector.

  5. #5
    Flashaholic*
    Join Date
    Jul 2001
    Location
    Linz, Austria
    Posts
    1,712

    Default Re: 7 led / halogen

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Stingmon:
    No, but I'd rather see those LEDs go all the way around the perimeter..
    I presume they did it this way to avoid any possibility of having the dreaded "doughnut" beam at very short range
    <HR></BLOCKQUOTE>

    No, they did it because 7 LEDs are enough for this purpose. It should replace the usual backup bulb, not the main bulb.
    But if you care, it is very easy to do it by yourself when you have such a lighthead. Just buy a spare reflector and as mayn LEDs as you want.

  6. #6
    Flashaholic*
    Join Date
    Jul 2001
    Location
    Linz, Austria
    Posts
    1,712

    Default Re: 7 led / halogen

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by kogatana:
    Pretty hefty price price @ $195.00 on this.<HR></BLOCKQUOTE>

    BTW, the direct Website is FX-LED

    And The FX lights are well known to be one of the most relyable caving light sources (maybe only beaten by the ActionLight). The have an incredible market share for electric caving lights in GB.

    If you can get a headlight of similar or better quality (rechargeable, with charger) for less, please tell us.

    Of course, when the toughness is not so important for you, these $200 may be too much. And for the same reason other lights weight less.

  7. #7
    Enlightened
    Join Date
    Apr 2001
    Location
    Asheville, NC
    Posts
    22

    Default Re: 7 led / halogen

    I caved with a guy using one of these lights this weekend. The 7 led's provide more than enough light to make travel thru a cave safe and easy. The spot is fairly bright, but is not easily focusable. He said that you can adjust the beam by taking it apart and moving the bulb (?). His was using the NiCd battery. We were underground for a total of 8.5 hours and his light never dimmed. He used the leds probably 98 percent of the time.

    The head cradle, the part that attaches the light's head to the elastic straps is very cheesy. All plastic, very cheap looking, like an afterthought. He junked it and mounted it directly to his helmet. The battery pack is also not thought out as well as it could be, design wise.

    However, overall durability, light output, and battery life seem excellent. It's easy to justify the $200 price tag for a primary light source with both leds and spot.

    BTW, I used a little 2 AA head light that I modified with a LS. It worked great. As bright as the 7 leds with fresh batteries, but quickly dropped off, but still enough light to cave with. I need to look into putting one of those boards that regulates the output over the life of the battery, can't remember what they are called right now.

  8. #8
    Flashaholic* MrAl's Avatar
    Join Date
    Sep 2001
    Location
    New Jersey
    Posts
    3,144

    Default Re: 7 led / halogen

    Yeah i have seen these lights, but didnt like
    the price tag :-)
    One interesting thing, i think i mentioned
    on here another time, is that one of the
    energizer 6v lantern batteries might keep
    a single LED running at 20ma lit to full
    brightness for over 2 years because it
    looks like a bigger battery at such low
    currents.

    --Al

  9. #9
    Flashaholic*
    Join Date
    Jul 2001
    Location
    Linz, Austria
    Posts
    1,712

    Default Re: 7 led / halogen

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by caver:
    The head cradle, the part that attaches the light's head to the elastic straps is very cheesy. All plastic, very cheap looking, like an afterthought. He junked it and mounted it directly to his helmet. The battery pack is also not thought out as well as it could be, design wise.
    <HR></BLOCKQUOTE>

    These lights are mainly made for mounting it directly on a helmet. They are also somewhat too heavy to use without a hardhat.
    Whats wrong with the battery pack? It's attachment works well and does it's job. I also did not like it when I've seen it the first time, but it worked out to be cave-proof.

    The headstrap is more or less to use an existing helmet mounted headlight also without the helmet (in a camp or so).

    These lights are usually bought by two groups of people: By cavers (or similar users) who just don't want to tinker around and by cavers who like to tinker around and who have spent too much time in a cave fixing their homebrew lights (or maybe even spent unwillingly some time in total darkness .-)

    I had many, many unexpected rests while waiting, watching and mainly listening (I learned a lot of new profane expressions there) people fixing their lights. In far too many occasions I had to fix their lights.

  10. #10
    Flashaholic*
    Join Date
    Jul 2001
    Location
    Linz, Austria
    Posts
    1,712

    Default Re: 7 led / halogen

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by MrAl:
    Yeah i have seen these lights, but didnt like the price tag :-)
    <HR></BLOCKQUOTE>

    You may buy them in GB where the pricetag shows a lower number (but an Pound sign after it .-)

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
    One interesting thing, i think i mentioned
    on here another time, is that one of the
    energizer 6v lantern batteries might keep
    a single LED running at 20ma lit to full
    brightness for over 2 years because it
    looks like a bigger battery at such low
    currents.
    <HR></BLOCKQUOTE>

    I'm quoting myself:

    That means (assuming the LED just uses a resistor for limiting current) the lantern battery has some 360Ah at 20mA? Which kind of lantern battery is this? The 'usual' square (about 7cm square and 11cm high)?
    Hard to believe.
    Even if you use a red LED and an almost perfect boost regulator it has to have more than 100 Ah.

    PS: Mral, is it possible that you don't put in a CR/LF every 40 or so characters?

  11. #11

    Default Re: 7 led / halogen

    I agree with PeLu, according to http://data.energizer.com/datasheets...r_oem/528.pdf, the Energizer 6v lantern battery can't provide 20 mA for more than 3 months before falling below 2 volts.

    Now a 6-volt golf cart battery---THAT's a different story! [img]images/icons/smile.gif[/img]

  12. #12
    Flashaholic*
    Join Date
    Jul 2001
    Location
    Linz, Austria
    Posts
    1,712

    Default Re: 7 led / halogen

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Duggg:
    I agree with PeLu, according to the Energizer 6v lantern battery can't provide 20 mA for more than 3 months before falling below 2 volts.<HR></BLOCKQUOTE>

    You had a comma too much:

    lantern battery

    Energizer seems to have F cells in it, but many other manufacturers just put 4 D cells into the same case (more cost effective). According to their data, it will be some 1.5 months at 20mA drain.

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
    Now a 6-volt golf cart battery---THAT's a different story!
    <HR></BLOCKQUOTE>
    They also will not last 2 years, as their self discharge is higher .-)
    (not for all, I know)

  13. #13
    *Retired* The_LED_Museum's Avatar
    Join Date
    Aug 2000
    Location
    Federal Way WA. USA
    Posts
    19,418

    Default Re: 7 led / halogen

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by PeLu:
    PS: Mral, is it possible that you don't put in a CR/LF every 40 or so characters?<HR></BLOCKQUOTE>

    He may have written his post on a web-capable cellular telephone or PDA; or wrote it on a TRS-80 model 100 and uploaded it later. None of these devices allows for 80 column text screens. [img]images/icons/wink.gif[/img] [img]images/icons/wink.gif[/img]

    I ought to see what CPF looks like on a Commodore 64 screen. [img]images/icons/grin.gif[/img]


    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by PeLu:
    No, they did it because 7 LEDs are enough for this purpose. It should replace the usual backup bulb, not the main bulb.<HR></BLOCKQUOTE>

    Good point. Not being a caver, I have no idea what it's like inside one and how much light one would *really* need to make their way back out if the main bulb popped.

  14. #14
    Flashaholic*
    Join Date
    Jul 2001
    Location
    Linz, Austria
    Posts
    1,712

    Default Re: 7 led / halogen

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Stingmon:
    Good point. Not being a caver, I have no idea what it's like inside one and how much light one would *really* need to make their way back out if the main bulb popped.<HR></BLOCKQUOTE>

    No, the second bulb is probably used most of the time. 'main bulb' for high beam is somewhat misleading. As the lighthead itself is already existing, there was no easy possibility to make more brightness levels.

    And my sympathies to Mral, as he writes long comments with such user unfriendly devices...

  15. #15
    *Retired* The_LED_Museum's Avatar
    Join Date
    Aug 2000
    Location
    Federal Way WA. USA
    Posts
    19,418

    Default Re: 7 led / halogen

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by PeLu:
    No, the second bulb is probably used most of the time. 'main bulb' for high beam is somewhat misleading.<HR></BLOCKQUOTE>

    Well, that shows just how much I really know about caving and the use of equipment. [img]images/icons/wink.gif[/img]

    Best leave all caving-related topics to you, and I'll stick to what I do best - which isn't caving. [img]images/icons/grin.gif[/img]

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •