Now, scientists have created colorful glow-in-the-dark succulent plants. “Picture the world of Avatar, where glowing plants light up an entire ecosystem,” study co-author Shuting Liu said in a statement. After being exposed to sunlight or an indoor LED light, the modified succulents stayed illuminated for up to two hours. When the team lined up 56 succulents on a glowing plant wall, their light was bright enough to illuminate nearby objects. Over time, the succulent’s light fades and the team is still studying the long-term safety of the particles on the plants.