Cutoff was better with HIDs, as was light output. The LED output is spotty and I wouldn't consider it a good alternative. The reason I used the D2S to H7 adapter was so that I could use a quality HID bulb and align the bulb as needed for best focused output, but still ran into issues with proper sealing and the bulb was eventually fall out since the bulb clips in these headlights aren't very strong and tough to bend down to get proper hold of the heavier bulbs.