Tc: this rack I have has a 2nd light mount and I’m considering a tiny LED for just-in-case
Beam shot if the Lumintop B01 in action on a MUP. One can clearly see the two hot spots. The far hot spot has about the same intensity top to bottom on a flat surface such that when it’s projected it’s brighter closer to the rider. It’s still out a ways so it doesn’t spoil one’s night vision, but isn’t brighter further out and less so closer, which the B&M folks seem to be aiming for. Don’t have one yet to compare, but will at some point.
This light is great for road users that don’t want to blind others. As I passed joggers, it barely illuminated their faces. It also had a sharp cutoff on the edges such that it doesn’t do a great job illuminating 90 degree corners on a MUP taken at speed. Likely nobody would ever see a turn so sharp on a road. Not for trails though.
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I want more bike lights to include a beam pattern shot or two as part of their product info
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Right? B&M is pretty good about this, I wish they included the bike, though to give a sense of scale and distance:
Also, searched all over their site, but they have a flat beam shot that’s similar to what @JUGE_FREDD described with the gradient hot spot from top to bottom, though I can’t see that as being especially evident in their beam shots.
They definitely have the double hot spot thing going as well.
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i think where it shows is that in that photo they look evenly lit, which takes more light at a further distance and wider spread
Ah, yeah, I linked the IQ-X, which is their most recent design and likely the best optic they’ve produced. There’s a widget at the bottom that shows the entire range of lights on a scale of lux.
Speaking of lux, I hate how they are using that terminology without any other context.
What distance? How large was the measurement area?
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i kinda prefer the cyo senso premium pattern but prefer the amount of light the x puts out. senso premium also has a real standlight
I got one of these on back order from Banggood I think it may have shipped tho, v keen as my Exposure light is just bare leds and no beam formingz
Euro lights showed up today. Beam on the smallboi is kinda narrow far out based on a 20 second test ride, will test more this weekend. L&M Urban 800 for scale.
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I got two of the 65/rear light combos, will report with my findings as well.
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Also, these are great for battery lights https://www.universalcycles.com/shopping/product_details.php?id=68268&category=
Oh, there’s an upside down version too
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That’s awesome. Presently suffering from an inability to mount my favorite light right side up. Just broke another stupid gopro extension arm. However:
MAX LUMENS: 290
wat
The STVZO lights are all about lux, not lumens.
They’re misusing the term lux which is a measure of light in a specific area.
Yea, but that’s just ad copy written by some sales bro with two Instagram accounts on a MacBook pro.
I trust the output of the emitter is correct, they probably even measured it themselves. Darren in sales just got the language wrong because it ‘reads better’
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Sure. They know fuckall. I wager that most “lux” numbers are bullshit because the people building the lights don’t have the equipment to test the finished product.
“Lumens” gives us an idea of the total output of the emitter and is published by the manufacturer of the emitter who does have the equipment to test the finished product, which is then binned accordingly.
Lumens is meaningful in that it tells us something about the light. Lux is meaningful in that it tells us that someone likely pulled something out of their ass.
In real terms, Lux or Cd, when measured accurately gives us a sense of the efficiency of the optic or reflector, but also presumes that some optics or reflectors are less efficient. When Lux is given without a distance, it’s even worse. Cd, in that sense is at least consistent.
These days, any given emitter will have a range of optics associated with it that are nearly perfectly efficient, so if the beam shape looks like what you want in terms of the size of the hot spot, then likely that’s going to be about as good as you can get.
Two decades ago, “lux” was meaningful, these days, not so much.
K
Lux
The Las Vegas hotel right? Wrong, that’s the Luxor. Lux (lx) measures illuminance, which is the amount of light on a surface per unit area. A single lux is equal to one lumen per square meter. If the lamp displays its brightness as a measurement of lux, it usually lists a distance from the bulb since any change in distance or bulb type changes the lux level. As an example, if you place a 100 lumen bulb in a flood light that shines on only one square meter of surface, that surface will be lit at 100 lx. However, if you back the flood light away to shine on four square meters, the surface is now lit with 25 lx.