Reptile One ReptiGlo T5 Reflectors are an energy-efficient, low profile, single tube reflector used to house T5 UVB fluorescent light tubes. T5 UVB fluorescent light tubes produce the required UVA and UVB spectra found in sunlight and naturally produce Vitamin D3. ReptiGlo T5 Reflectors enable the T5 UVB fluorescent light tube to operate and are an essential part of your terrarium. Features & Benefits: Energy efficient electronic ballast, no need to replace starters. Low profile reflector provides more flexibility for placement. Curved silver reflector maximizes light output. Easy to install and maintain. Suitable for all standard T5 fluorescent tubes* (*sold separately)