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-   -   Lupine "Betty 6" 2600 Lumens on Helmet (http://www.bikeforums.net/electronics-lighting-gadgets/832945-lupine-betty-6-2600-lumens-helmet.html)

Burton 08-08-12 04:53 PM

Quote:

Originally Posted by trekmogul (Post 14580260)
I honestly have no desire or interest in beam shots from my Lupine betty Six 2600 Lumens Light. I am quite pleased with it as cost vrs Chinese junk was never a factor. I have always bought good quality and i feel this lamp is of very very good quality..


Actually I planned on posting beam shots myself ...... With the intention of demonstrating that different beam widths CAN be accurately compared using photographs, and that, depending on the beam spread, 1,000 or 3,000 or 4,000 or 5,000 lumens can all be photographed at the same settings ans still provide equal brightness in the central areas. Beam width may not be important to everyone, but it is to me and I'm currently running a prototype array of about 3,600 lumens that I wouldn't swap for anything currently on the market.

And I'm expecting that no-one here will have any difficulty deciding which is which either.

trekmogul 08-09-12 05:10 AM

I had spoken with Dan @ Lupine Lights yesterday and this fall Lupine will be updating the Lupine Betty 6 (2600 Lumens) to (3600 Lumens).. Also updates to the Wilma and Pico..What an incredible company..

JohnJ80 08-09-12 09:01 PM

Piko's going from 750 lumens to 900 lumens. They already have the kits on the website and just don't have the individual bare lampheads at 900 lumens yet.

That says that the Wilma ought to go up to 2000 lumens from 1500 (wow) if it goes up by the same percentage. Wow!

J.

Burton 08-19-12 11:18 AM

More lumens doesn't necessarily mean better lighting
 
3 Attachment(s)
Where the light goes is as important as how much light is available.

Most bicycle lights tend to be a lot like flashlights - a narrow circular beam that has a beam spread of about 15 degrees. To provide an equal amount of illumination over a 45 degree circular area would require NINE TIMES the light output - simply because that's the difference in area covered.

The problem for bike light manufacturers is vs a 10 watt 900 lumen light with a 15 degree spread, a 45 circular beam would require a 90 watt, 8,100 lumen output to provide the same level of illumination over that larger area. And battery cost and run times would be affected accordingly.

So cars went to a combination of prismatic and Fresnel lenses a long time ago to control beam spread and make it more energy efficient and more effective. Bicycle manufacturers could do the same thing if they wanted to. Spreading a beam only sidewise to cover 45 degrees would reduce the requirements from 9x to only 3x or 4x that of a 15 degree circular coverage.

This is a conventional 10 watt 900 lumen LED using a projector lens and grid to produce a 20 degree beam. Photo is taken in an unlit section of a bike path. Exposure is ISO 100, F4 and 1 second. That's 1/4 the duration normally used to post beam shots.
http://bikeforums.net/attachment.php...hmentid=268251

And this is a 40 watt 3,600 lumen array using projector lenses and Fresnel lenses to produce a 45 degree beam while still limiting the vertical spread to about 20 degrees. Exposure is ISO 100, F4 and 1 second. Lighting isn't brighter - just the coverage is wider. But the lighting IS more effective.
http://bikeforums.net/attachment.php...hmentid=268252

Street illumination with that array is pretty good even with wet pavement and the indirect stray lighting will still pick up reflective surfaces a couple blocks away.
http://bikeforums.net/attachment.php...hmentid=268254

Some people are apparently perfectly happy with a couple hundred lumens and a narrow beam - I can't imagine that myself. This is as big a change from conventional bicycle lighting as making the move from 10watt halogen bulbs to 10 watt LEDs

arashid 03-12-13 06:01 PM

This is what I'd really like to know more about...
 
Quote:

Originally Posted by Burton (Post 14532700)
I spent about $1,000 on a custom built lighting system myself, after looking at the Bettys. What did I get? As much beam spread and coverage as an automobile, about four times as much run time as the best bicycle light on the market, a lifetime warranty and a completely waterproof and vibration proof package. Absolutely ideal for MX competition. Would I do it again? I plan on it.

...for my Fargo. I don't know much or have much experience, but if this is that awesome, well I'm at least curious. ?

krobinson103 03-12-13 06:29 PM

Quote:

Its several things i guess.. 1 is that the quality and wormanship of making this light is unreal. Also it is a true genuine 2600 lumens and not the over rated Lumens the Chinese slap on there junk.. Not sure if its worth a 1100.00 but i wanted it anyways..
Sounds like quite a light. I have around $400 invested in 3 lights. 2 small 200 lumen 18650 - one for the bars as a spot and one on wide on my helmet and one 1000 lumen 3x18650 as a wide beam on the bars. That gives more than enough light for the speeds a bike rides at. don't think I could justify $1100 worth of light, that would actually cost almost as much as my best bike and equal the cost of the other two combined. :)

agent pombero 03-12-13 08:29 PM

I don't think the Lupine is worth it IMO. Niterider makes fantastic lights and the 3600 lumen is 1/2 the cost of the Lupine.

Burton 03-13-13 04:21 PM

Quote:

Originally Posted by arashid (Post 15378841)
...for my Fargo. I don't know much or have much experience, but if this is that awesome, well I'm at least curious. ?

The beam shot posted on this page with 40 watts is 3,600 rated lumens and closer to 2,800 actual. Its still more than most cyclists need and cost half the price of the $1,000 array I use for off-road. Personally I wouldn't consider using more than that on public roads. I'll be setting up a couple commuters with twin lamps for general use, and will be keeping the higher outputs for the bad weather and off-road bikes.


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