Reinventing the Wheel
While you're at it, S-M, you may like to know that it has also been discovered that Mercury vapour makes good street lights (the purple-blue ones, not the orange sodium ones) and that modern sodium variants use high-pressure sodium to give spectral line broadening and excite additional energy levels, yielding a warm pink rather than a harsh orange.
It would serve you well to read more widely so you know what wheels already exist, before you try to reinvent them.