Please choose the correct ending to complete the given sentence: Health: [header] How to see in the dark [title] Utilise your rod cells. [step] Your rod cells take about 30 to 45 minutes to adapt to a change of light around you. Rod cells can only see black and white and have poor resolution but are very sensitive in night vision circumstances.

Ending1: Know what to look for by measuring the amount of lights in your location : [substeps] Nothing is behind or behind you in the dark. There are lights throughout the distance, and the darkness can be startling. Ending2: Your rods cells will produce dark lights when you put them in your vision, meaning they are very dark but much lighter. To see the darkest cells in the screens, simply place the rod cells under red light at each corner of the screen. Ending3: [substeps] Photopigments are chemicals contained in both rod and cone cells that are light-sensitive and convert what you see into a language that your brain can understand. Rhodopsin is a photopigment found in rod cells that is critical to night vision. Ending4: Review your rod cells before you go to sleep at night. In the morning, use your rod cells and your rods cells during the day.

Answer format: ending1/ending2/ending3/ending4