... heat dissipation;5. Built-in fan for active heat dissipation, no high wattage cooling systems needed, no ballasts or reflectors ... , lead and so on;13. Can be widely used for hydroponics, horticulture, greenhouse lighting, seeding, seedling, breeding, farm ... distortion<15%Beam angle60/90/120degreesWorking environmentindoor use, applicable for dry environment Working environment Temperature -20°c to ...