Yeah not too bright lol ......H4 Cyclops LED bulb:
Apparently in the US the 990 adventure upper light is a marker / sidelight and the combined main/dip bulb fits the lower light. In the UK main beam and low beam are of course separate and Cyclops make a different model for US/UK markets, the UK market bulb is just a main beam LED.
The UK/Euro 990's have a headlamp that utilizes separate H3/H7 bulbs for Hi and Low beam. The US 990's have a headlamp that uses an H4 that is a single combined Hi/Low bulb. The top bulb in the US headlight is just a simple "marker" light. Cyclops sells two separate setups for the US versus UK 990's. Just email if you need help, they will take care of you.
So I called Sportouring today and asked given that the bulb is a combined main and dip which bulb should it replace and will both dip and main LEDs illuminate if used as a main beam only - they couldn't answer my question and will get back to me once they 'have done some research'.