# Edison and team tested 6,000 filaments to perfect light bulb
See also 10,000 ways that don't work.
# References
How Innovation Works (p. 253).
He and his team tested 6,000 different materials for the filaments.
See also 10,000 ways that don't work.
How Innovation Works (p. 253).
He and his team tested 6,000 different materials for the filaments.