I have a 4" tall Serissa Foetida Bonsai currently hanging out outside a Northern facing window that requires more sunlight that I can give it. I'll be moving soon so it won't be an issue in the long run but for now i gotta keep this guy alive for 4 months. https://imgur.com/pgU02Ok

I already have these: https://www.amazon.com/dp/B07LG39B3M/ref=emc_b_5_t (2 of them actually)

But i understand they are not enough.

The Serissa is current sitting in a North facing window in NYC (the only side i have light coming in!) so i want to rig a light or 2 for outdoors for the tree for the rest of the day as he doesn't get much direct sunlight after 10:30am....

this is the one i am looking at. It's a "150w" (60 watt draw) COB LED spotlight. it comes 2 Kelvin: 3,500 and closer to 6,000. Which do i get? If i have to get both I probably will but the bulbs are large so I'd rather just have 1. Which Kelvin? https://www.amazon.com/dp/B07T47G2L2/?coliid=I3CBIE5CDG4LGC&colid=2Y089HAZ3UH6C&psc=1&ref_=lv_ov_lig_dp_it

Unless you think the bulb i've chosen is not wise. I can't do a hanging panel as it's just outside my apartment building on a windowsill. I plan to just put the light outside, so i'll probably have to get it a waterproof light socket and a rain guard.