How many lumens/watt are these compared to the XPGs?
Once you get to a certain brightness, any increase becomes (arguably) irrelevant.
But, if you can achieve that level of brightness (whatever it may be) in a smaller package, using a lighter battery or increasing run time then that would be of interest.
For me, a helmet/bar combo is ideal. And I’d want the main bulk of the power on my bars with the helmet giving directional fill.
I went out last night with my Spokeshirts light (new DX style) on helmet and one LED converted Lumi can running the XPG triple board and BCT’s 670mA driver.
That is plenty of light. The Spokeshirts light will do 3hrs on full (9 on low) and the Lumicycle will go for 12hrs plus (I tested two cans on high and they went for 7hrs 20 mins. A friend of mine tried a single can on high to check he had enough juice for the D2D and gave up after 12hrs).
To be honest, the battery for the Lumi is too big, but was purchased for the days of 20/12w halogen. I am currently waiting for the bits to arrive to convert the second Lumi can to LEDs with the XPG triple board and BCTs new 830mA driver. Even running both of these, the battery should still give 6hrs or so with both on high. I’m almost be tempted to get the battery off to Lumi and ask them to split it into two separate smaller batteries.
The Spokeshirts light is great for the money, but I’d prefer it to not have a separate battery for helmet duties and it does sit quite high on my bonce.
With the advances in LED technology like you’ve demonstrated my ideal helmet light would be a similar output/run time to the spokeshirts but with an all contained more compact unit……