I ordered 2 of these lights about a month ago for one of our forklifts at work. They are very bright and should be just what you need for a mower. They have just a hint of cool blue color, but I think they appear mostly neutral. At about $7 each, they are definitely budget.
https://www.amazon.com/dp/B0796TN823/ref=cm_sw_em_r_mt_dp_U_I8n-Db0NGDZDR