All boats rowing in dusk or dark conditions must be lit with a white light at each end of the boat. Crews are wise to add a third light shining sideways from the bow of the boat to the bowside, as this helps show up where the low and muddy bank is. There are very few streetlights and night-visible markers on this stretch of river except the top, bridge area.
Other safety issues
By common consent launches are not generally used on this stretch of river for coaching. Coaches should bring sturdy bicycles and powerful megaphones for use from the towpath. Radio links come in particular handy on this stretch. As suggested on the weather page, during high river conditions it can become very dangerous to boat upstream of Henley Bridge, so boats may need to be walked round from Henley RC for launching from Lion Meadow. Always take care not to hit Temple Island, scullers especially.
The Henley reach is not tidal, but floods quickly in winter. Obey Environment Agency and local club guidelines for boating and always seek local advice if you are unsure. If the river breaks its banks on the rowing stretch then crews should not be boating, and if it is flowing fast or high then going through Henley Bridge from either direction will be dangerous. In these conditions also avoid spinning too close to the locks and weirs at either end of the reach.