You want spotlights as opposed to floodlights because spotlights can be positioned away from the plants where they won't cast shadows from the natural light on your plants. I have been looking at bar shaped spotlights that are made for motor vehicles to use in my greenhouse because they are cheap.
For example, see:
https://www.ebay.com/itm/124849998864
https://www.aliexpress.com/item/1005001866003623.html