light ballast การใช้

• Rated at 250, 400, 1000 and 1500 watts, the high intensity discharge lamp, parabola-shaped reflector and light ballast are each sold separately.
• Residential sources produce around 66.5 mkg / yr, or about 22 per cent of the total, in the form of dry-cell batteries, fluorescent light bulbs and light ballasts ( which contain PCBs ), cleaning fluids, pesticides, expired drugs and waste oils.