So I never did try to fix the light in my dining room, but I did spend yesterday in my front yard and Home Depot. We had a huge garden we've never put much effort in to, so it had become overgrown with weeds. We had three pines removed last summer, so not much will grow there. We killed all the weeds and were just going to lay mulch down. We measured, and went to Home Depot to get mulch and landscaping fabric. I measured the area, then did the math at the store. No f'n way could my math be right (it was 50% bigger than my first house, that coudn't be right). So I estimated down for both mulch and fabric. Two more trips to Home Depot were required, and it is still not completely covered in mulch.
TLDR - I am incablable of completing any household task with only one trip to Home Depot.