Nice clean looking layout but it looks like to me your lamp is too high, especially for flowering. Even out the canopy like others have suggested first.
The best way to make sure your plants are in the "sweet zone" is to buy a light meter. Seedlings and clones only require 375 ft candles or 4000 lux, vegetative growth is 2500 ft candles or 27,000 lux but flowering is 10,000 ft candles or 107,500 lux for optimal growth.
Remember, if you have a 1000 lumens light it will give you 1000 lumens 1 foot away from the bulb, 2 feet away it will only be 1/4 of that or 250 lumens, three feet away it is 1/9 or 111 lumens and 4 feet away its only 1/16 or 62.5 lumens.
If you don't have a light meter, a good way to determine the closest distance of your light from your plants is to hold your hand palm down over the top of your garden and start raising it slowly towards the light. You want to try and find the spot where you can hold your hand for a least 20 seconds without it becoming too hot. No being a hero here......For a 1000w lamp it will probably be between 24 and 36 inches below the bulb. Never let your hood get closer than that to the canopy. Some people I know actually hang a string on their hood and when they see it get close to the tops, they raise it.
Great first grow!
