High light output, realistic technical data, expensive.
2500 lumens from an apple-sized headlamp is a real advantage compared to the many cheap and chunky LED bars with totally wrong lumens (China lumens about 20-30% of a "real" lumen). The 30 watts are right. He also gets really warm. The light output is significantly higher than a halogen car headlight with a H4 lamp. The light distribution spreads quite wide and illuminates the environment well. However, when looking for a buoy at a distance of 500m, it will be difficult (especially if the buoy, as in D unfortunately often not reflected). Perfect is the headlight but for river or canal trips.