This great value, special offer of two x 8W Nisbets Essentials fly killer replacement fluorescent bulbs will help you keep your rooms hygienic for less. These Actinic BL T5 fluorescent bulbs emit a spectrum of light that perfectly matches the eye sensitivity of flies. This means they'll attract more insects to your fly killers to ensure your kitchen and dining areas are free from unwanted pests.This pack of two x 8W replacement bulbs is designed for use with the Y724 and FD499 Nisbets Essentials fly killers (sold separately).