The flood style work great I just aim them off to the side a bit probably not over 10-15 degrees, certainly not as much as 45 degrees. This is the style I use under the truck bumper.https://www.ebay.com/itm/2x-6INCH-36W-LED-WORK-LIGHT-BAR-SPOT-OFFROAD-ATV-FOG-TRUCK-LAMP-4WD-12V-6/392292938458?hash=item5b567b32da:g:BoUAAOSw7gdc0UOl
I have 2 pair of this style on the headache rack on my open car trailer. One for back up and 1 for loading. https://www.ebay.com/itm/2PCS-4INCH-27W-Round-LED-WORK-LIGHT-BAR-Spot-OFFROAD-DRIVING-FOG-LAMP-12V-USA/254185654784?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D20131003132420%26meid%3Dd1fa8248627249abaff91aaf4c5adab3%26pid%3D100005%26rk%3D4%26rkt%3D12%26sd%3D391874642369%26itm%3D254185654784%26pg%3D2047675&_trksid=p2047675.c100005.m1851