The balloons come in white, light blue, red, orange, yellow, purple and pink. Simply drag a tab out of the balloon envelope and a lamp will light up. There is also an instruction manual here. All balloons lit (some even until morning) a burst me during inflation. We had hung the balloons to decorate a child's birthday party (8.Geburtstag) with the theme "Disco" at the ceiling. Along with glitter garland it looked pretty good, but the lights shone in total darkness with an intensity of fireflies. I had imagined a little more light and the children had not noticed.
Conclusion: Very nice, go for secondary lighting but under quickly.
