I recently bumped on to this really cool spray that can make you visible during night time. Its really unsafe to be riding a cycle in dark, against all other options for a cyclist to get visible in dark, this spray looks really awesome. As described in its official online shop page the description of the product goes as follows:

LifePaint is a unique water based reflective safety spray. Invisible by daylight, it glows brightly in direct glare of car headlights. Making the invisible, visible. LifePaint washes off, and will not damage the colour or the surface of your chosen material, lasting more than a week of normal usage.

LifePaint can be used in all sorts of ways. Please note that it works best on textile materials. Applied to clothes, shoes, helmets, pushchairs and children’s backpacks – even dog leads and collars.