Wind powered DC motor to LED
If you want to know how it should be done.

I have done something similar but with 4 100 Watt solar panels.

I use lead acid batteries.  You could use NiCd batteries.  I say NiCd because they can handle more abuse than any other battery beside lead acid.  And lead acid is too high a voltage for this project.

You need to harvest the energy from the wind turbine. Then use that energy to charge the battery. You would use a boost-buck regulator to charge the battery.

You then connect the LED to the battery through a current regulator. 

The image below shows how I did it, bigger scale but the same approach.

Mine has a little extra.  I also have a power supply that will power my LEDs when the solar panels and batteries cannot.  The OR Diode controller switches automatically depending on if the solar power voltage is higher than the power supply.  

The MPPT, Maximum Power Point Tracking Charge Controller charges the batteries from the solar panel as long as the panel has some energy to contribute. The panel voltage ranges for zero to about 80 volts at typically 5 Amp. 

Perhaps if you attach a more efficient propeller blade to the motor you will get more out of your wind turbine.

So you just need a boost-buck battery chargfers, a battry, and a current regulator for the battery to power the LED.