The screws that come with the L-Brackets at Lowes are actually a tad too long to go into the microman bar. use your best judgement and just purchase a box of screws that are shorter but have the same size head. But you are correct, the original microman screws are not appropriate for the Lowes L-Brackets. I can only tell you this from the experience that i went through when I had lost the original mounting hardware that came with the light.