Phenomenal tail light. Brighter than bright! Super easy to swap between bikes. The seat rail mount accessory is recommended for rough off-roading. Tremendous service from L & M--they've been lighting my way since way back in the halogen bulb days at the 24 Hours of Canaan.
It works.. only when the light head is not attached to the battery as the adjusting "wing nut" will not turn if you attach this mount to the bottom of the battery. Not usable with a mag grip as I had hoped.
If you only use the Prophoto OCF line of modifiers, this works well. Don’t expect to put regular Profoto rfi speed rings on it and use full size modifiers. They really should mention this in the description.
I use these lights to light reporters I work with in TV News and often receive compliments on how nice my lighting looks. I absolutely love these lights in my kit!