Check the listing for details. Tower Red Green 24V LED: Q-Light Co. ST56L Signal Lamp Light Stack. Condition: Used. Listed at 7.49 USD. This Signal Lamp Light Stack Tower by Q-Light Co. is a top-notch solution for all your lighting needs. With a 24V LED, this red and green light tower is perfect for use in facilities such as factories, warehouses, and construction sites. The tower is highly durable and reliable, making it perfect for use in demanding environments.The Q-Light Co. ST56L Signal Lamp Light Stack Tower is ideal for businesses and industries that require bright and efficient lighting. With its red and green lights, it is perfect for signaling and indicating different conditions. This tower is easy to install and operate, making it a great choice for any facility. Get your hands on this high-quality lighting stack tower and take your facility's lighting to the next level.