In some older fluorescent fixtures, which chemical might be present?

In some older fluorescent fixtures, which chemical might be present?

• A. PCBs
• B. Ethanol
• C. Propane
• D. Carbon dioxide

Answer: (A)

Older fluorescent fixtures sometimes contain PCBs because they were used as dielectric fluids inside ballasts and capacitors. PCBs were valued for their electrical insulation, heat stability, and long life, making them a common choice for ballast components in older lighting equipment. However, PCBs are toxic and persistent environmental pollutants, which is why their use was phased out and equipment containing them is handled as hazardous waste today. The other substances—ethanol, propane, and carbon dioxide—are not typically part of ballast components or insulation in fluorescent fixtures, so they aren’t the likely presence in this context.

Older fluorescent fixtures sometimes contain PCBs because they were used as dielectric fluids inside ballasts and capacitors. PCBs were valued for their electrical insulation, heat stability, and long life, making them a common choice for ballast components in older lighting equipment. However, PCBs are toxic and persistent environmental pollutants, which is why their use was phased out and equipment containing them is handled as hazardous waste today. The other substances—ethanol, propane, and carbon dioxide—are not typically part of ballast components or insulation in fluorescent fixtures, so they aren’t the likely presence in this context.