One of the great things about the last few months has been sunny weather, and the chance to build outside during the day, rather than just inside at night (Quick reminder for northern hemisphere readers, it is summer here, and holidays finished only a couple of weeks ago). What became apparent is that when building under sunlight, the trans fluoro reddish orange elements (also called Trans Neon Orange on bricklink) tend to become brighter in the sunlight, with an eerie glow. This was not obvious when working under an incandescent lamp at midnight. It turns out that these transparent fluorescent colours are, intact, fluorescing.