revised narrative option:

light searches for friend vibrates to spawn new friend, new friend is sleepy tires to sleepy (change to sleepy color) other light having brightened up wanting to play nudges sleepy one, dose this a few time sleepy one becomes grumpy and chases playful one while its color changes form sleepy to red then red to playful(increase in sleepy tone to chipper?)

due to issue with light intensity controls may need to rely on glow spread.