Excuse me, about DIY indoor spotlights.

There should be no fire (unless you use particularly inferior wires)

I suggest you use high-power incandescent lamps. You can control the color of light with white balance. Your light output is not enough.

If you have some money, you can consider buying several old domestic flashlights, which cost tens of dollars each, plus a wireless flash, which is also tens of dollars each. The effect is much better.