For the preservation of the dark site environment dim red lights only can be used. White light (and bright red light) quickly destroys night vision, which takes up to an hour to fully recover.
For 2007 the Northern Observing field will be designated the visual observing field where strictly only dim red lighting must be used (including laptops and camera LCD screens etc). The Central Observing field will be more suited to astro imaging where the policy for screens will be more tolerant.
Any computer screens or digital camera LCD or similar used on the visual observing field must be fitted with a deep red gel type filter (as used in theatre lighting) or similar (cellophane is not sufficient) and a light screen. Laptops, camera screens etc used on the central observing field need not have a deep red filter but must be operated at minimum brightness (with additional neutral density filter if necessary), have a light screen and be facing outwards from the field or otherwise so as not to annoy or affect the night vision of others. A cardboard box on its side can be used to make a simple but effective light shield.
When walking around aim red torches at the ground. Headband red LED torches should be aimed downwards, dimmed and if possible the white LED’s should be disabled or filtered.
All lights in buildings at the camp will be changed to red. There should be no white lights in tents and any caravan white lights should be disabled or a red filter applied. Make sure your car can be entered and locked without activating any lights, other wise the lights should be taped over.
Please come with your equipment prepared. The committee will have available a limited supply of red gel filter for laptops and torches, LED headlamp dimmers, black tape etc.
Green lasers are not to be used at any time.