There already exists a fairly good replica of sunlight, Philips CDM. I used it when I was growing weed, lushest bushes I’ve ever seen. 10/10 buds.

It was discontinued for a while but I’m happy to see it’s back in production?

https://www.futuregarden.co.uk/philips-ceramic-discharge-met...

I would pick a CDM bulb any day over the alternatives, including LED, unless power consumption is an issue.

“ Philips daylight CDM lamps are extremely efficient ceramic metal halide lamps with a spectral output close to natural sunlight. As a result, plants form more lateral branches, have smaller inter-nodal spacing, more flowering sites, and larger root systems, culminating in strong, healthy growth and high-quality yields.

Philips CDM bulbs have an amazing operating life. They maintain their high output for a lifespan of 30,000hrs on average.”