Ideal for use in a D.I.Y space where a tent is not being used.
Dual layer black and white sheet. The black side reduces external light and the chance of light leak, the white side reflects a high amount of light, in a diffused way so it reduces the likelihood of hot spots.
How to use
Simply line the space you wish to use with the sheeting making sure there is an overlap between each sheet. You can attach the sheet to a structure with aluminium tape for temporary solutions or with staples for more permanent spaces.
Any holes or spaces between sheets will allow leakage and not optimally reflect light back into the room, so the whole space should be covered.