Let me start by saying that integrating a light into the Shimano E8000 reduces the power assist range of the battery. Let me explain...
I originally ordered my ICE Sprint FS E8000 with the integrated Edelux light. It's tied into the E8000 battery and is operated via the E6100 display. The problem...the firmware of the E8000 gives priority to the light. Why is this a problem? The battery indicator on the display shows 5 bars when the battery is fully charge. Not to long ago I was riding up a substantial hill and my battery indicator went from 2 bars remaining down to 1 bar. Fine...I thought I had 20% of battery life to get me over the hill and home. NOT. A few seconds after the display showed only 1 bar the motor shut down and I was on my own. Remember that light priority thing I just mentioned? Well the firmware allocated the last 20% of battery to the light and shut down the motor. Even turning the light off didn't solve the problem.
Easy fix. Using Shimano's E Tube app for iPhone and Android (see my post E8000 Customizing via Bluetooth) you can disconnect the light from the system. And then remove the light by taking the access cover of the motor off and undo the light wires (pic below). You'll have to use a light with its own battery that is independent of the E8000 system. Without the integrated light the motor now utilizes the entire battery range.
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| The two silver screws hold the light wires in place. The larger black and white wires are for the front light. The smaller black and red wires are for a rear light that proved to be useless as a daytime light and the connection wires on the light kept falling off. |
It would be nice if the firmware allowed the user to decide whether or not to prioritize the light. But it doesn't. So here is what you can do, when the display is connected to the E Tube app on your phone (or Pad) choose Customize then select Drive Unit and on the final screen you'll see Light connection. Decide if you want the light connected or not.
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| iPhone screen shot |
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| iPhone screen shot |
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| iPhone screen shot |
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| I now use my old DiNotte light with its battery on the boom. It's a great daytime running light.
BTW if you choose the integrated Edeluz light it's excellent for night riding but it's useless as a daytime running light because of the way the light casts its beam. However when I was using it I cut a piece of frosted plastic film and put it on the lens to diffuse the light for daytime running. It worked well.
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