No. Fuses and circuit breakers cannot detect low-level arcs. Only AFCIs are specifically designed for that purpose.
The floodlight will have a broader light pattern, while a spotlight will focus on a more narrow area.
Anything exceeding 1500 watts could be a fire hazard.
The most common wattages for 4-foot fluorescent bulbs are 25-watt, 34-watt and 40-watt.
You can purchase an inexpensive tester at any home improvement store. It has LED lights which will tell you if the ground is properly configured.
The NEC (The National Electrical Code) covers: