Then get the good daylight-simulator LEDs from Yuji[0]. If the spectrum is still too incomplete for your tastes, I'd recommend a carbon arc lamp, perhaps with a spectrum shaping filter to get up to 5600 K CCT.

[0]: This model is AFAIK the cheapest one per lumen in their non-entry-level series: https://store.yujiintl.com/collections/vtc-series/products/v...