Choosing the right reflector for your room is essential. Generally, the wider the reflector, you'll acheive better coverage and have less heat spots. Adjust-a-wing reflectors are a great choice. Reflectors will also degrade over time through the heat exposure from your grow lamps, as the surface oxidises.
Reflectors will often become covered in dirt/dust, residue and minerals deposits from foliar sprays. Remember, 50% of your lamp is hitting that reflector so keeping them shiny new is just as important as a reload on fresh lamps!
