Balloon-carried light effects can be used without safety concerns at events with a lot of people, because unlike fireworks they do not require the use of flammable substances.
To realise a balloon-carried light effect, one or more balloons are used, capable of carrying a lightstick or a small battery powered lamp.
It is also possible for larger balloon-carried light effects to use tethered balloons, which also can contain an electric cable power supply: these 'artificial moons' may be used for floodlighting.
For film and event use, balloons are offered as suspended air-filled or tethered floating helium-filled.
The latter for outdoors uses a 2-meter diameter balloon and 4 1000 Watt halogen tungsten lights inside, rising up about 10 m and withstanding only calm winds.