Unique glow in the dark hi-vis technology. VizLite DT has won many design and safety innovation awards.The Helly Hansen UC-ME has strips that charges by exposure to UV light, either natural or artificial. It quickly reaches its full charge in 5-10 minutes and glows for up to 8 hours. VizLite DT increases safety protects people by increasing their visibility in low light and dark conditions. The Helly Hansen UC-ME Range is perfect for your hi-vis glow in the dark workwear.