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Cyclops 10.0 H4 LED Headlight Bulb (Street)

#1 Best Seller
in Rally Accessories
5 reviews
7 items left

Now available in the original version or the Ultra version. The original uses the front two emitters for low beam and then switches to the rear two  emitters for high beam, The Ultra uses the front two emitters for low beam and then runs all 4 emitters on high beam at a reduced wattage. wattage is 38 watts on low and 38 watts on high.

By far the best LED headlight bulb cyclops has ever offered. We have taken all that has been learned over the years and rolled that into our latest 10th gen bulbs. This bulb uses 4 cree XHP 50 emitters capable of more than 2500 lumens each. The brightest Cyclops H4 bulb.

  • All new metal construction for bases and collars.
  • Better thermal efficiency 
  • Better beam pattern differential between high and low beams. 
  • 5600k
  • 38 watts 
  • Removable metal base plate for easy install.
  • Screw on connectors at driver
  • Standard H4 connector
  • High / Low Beams
Operates on DC power only, so if you have a bike with H4 bulbs and AC power system you will need a rectifier. Most street legal bikes are DC powered, the exception is the KTM EXC 250/525/530 carburetor bikes and most other dirt bike based dual sports.



  • Street bikes only
  • ALL bikes with H4 bulbs and DC Power System.
  • Bikes with H4 bulbs and AC power system will need a rectifier
  • Does not fit Super Duke GT 



This product can expose you to chemicals known to the State of California known to cause Cancer or birth defects and reproductive harm. For more information go to: https://oehha.ca.gov/proposition-65

Customer Reviews
2.6 Based on 5 Reviews
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Filter Reviews:
    Daniele M.
    United States United States

    Very powerful bulb. Best price I could find on the web. Fast shipping, good communication.

    Andrey B.
    United States United States
    Shipping takes for ever

    I ordered 4 pairs of H-4 LED lights every time it took over 3 weeks just to ship it. Last pair I ordered H-4 7000 they did not last me even 6 months

    United States United States

    Excelente light

    Christopher M.
    United States United States

    Didn't work on the GT. Sent it back but only received a partial refund,even though the defect had nothing to do with me.

    Jason K.
    United States United States

    did not work, low support from you, insisted product worked, no followup on returning item (tail light bulb). last time i shop here

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