I see how it dips by changing to the single LED with the diffuser, similar to this one I use in my single cree light for round town and seems to work.found this and it seems to offer a dipped beam
https://www.amazon.co.uk/gp/offer-listing/B015FFO5DM
Reveiws look reasonable with just a few battery issues..
https://www.amazon.co.uk/SEEN-ANGLE-DIFFUSER-LIGHTS-APERTURE/dp/B00DQ5IGMU/ref=sr_1_fkmr1_4?s=sports&ie=UTF8&qid=1506462735&sr=1-4-fkmr1&keywords=magicshine+diffuser