Or this one: MARS HYDRO TS 1000W Led Grow Light Sunlike Full Spectrum LED Growing Lights for Indoor Plants Greenhouse Veg Bloom with Updated 342 LEDs Hydroponic Led Growing Lamps with Hanger Actual Power 150Watt https://www.amazon.com/dp/B07RSRX1RS/ref=cm_sw_r_cp_api_i_MiVzEbDPT90XK

Need a link to the greenhouse so we can see how big it is and how the racks are . If you’re using artificial light it’s going to be more intense the closer to the light . If you want even lighting on all of the racks you will need separate lights under each rack, otherwise you could maybe get get away with putting the low light plants on the bottom but the ones above will shade them, this will work better if the thing is outside or by the window getting natural light too. If you wanna just put one light on top a full spectrum led would probably suffice for what your doing, not sure what strength though . It’s going to be pretty strong close to the light but once it gets a few feet down the light will get pretty weak even though it looks bright, so you gotta check the specs. If you have like four racks in both sides you can put a light in the middle but you may be better off putting two weaker ones on each side instead, because not only does the light get weak with distance below but distance going off to the side too. These lights have a good diagram of how the light spreads if you scroll through the pics. it’s the fourth picture in that particular light covered 3x3 feet but as you can see it’s most intense in the middle, so if you put that in the middle of two racks , most of the light would get wasted