Book 18 connectors and sensor modules for street and area lighting. Long-Join Photocell also supplies wire-in and low-voltage DC photocells for solar and off-grid lighting, shorting caps, and waterproof receptacles. Its smart product lines include Zigbee, NB-IoT and other networked controllers that integrate with NEMA and Zhaga interfaces for smart-city street lighting. The company supports OEM and ODM customization of parameters, housings, and covers, and provides technical documentation, testing reports, and after-sales guidance for lighting manufacturers and distributors.