A: You are probably correct on this one. One of the side effects of Prozac is drowsiness and so this may be what is causing you to be tired in the afternoon. For some people, this effect does go away after a period of time until the drug levels become more level in the body.
Put another way, LEDs use about 12% of the energy used by halogen and filament bulbs to emit the same amount of light. We can also calculate that a 50 Watt halogen spotlight produces about 600 lumens. An LED light would need to be about 6 watt in power to produce the equivalent 600 lumens produced by a 50 watt halogen. We can now see clearly that a 3 watt LED spotlight would produce 300 lumens, not 600 lumens, so definitely not equivalent to a 50 watt halogen bulb.
Here's a handy guide to shine some light on how to choose the correct light bulb in this new age. Traditionally household incandescent light bulbs were rated between 40 to 100 watts. In comparison, newer LED or CFL light bulb come equipped for as little as 5 to 15 watts. The reason for this discrepancy is wattage tells you how much energy a bulb uses. And since the new LED and CFL light bulbs use much less energy, their wattage is much lower.