these are just the "farm tractor/implement" rubber housing flood lights. about $10 apiece at most auto parts places, Menards, Home Depot, Northern Tool, Harbor Freight, etc. no big deal finding them really. then, at your nearsest car/truck supplier, have them order up the 100 watt spots for them. i could be wrong, but i belileve they are called the PAR 36 (?) size lamps. about 4 3/4 inch diameter i believe. just pop out the old sealed sealed beam flood and pop in the new spot. these lights are found all over. not a big deal.