Sunlight’s Effect on Plants

In this experiment, I am looking for whether the amount of sunlight can effect the growth of plants. If the same plants are given different amounts of sunlight over a period of time, then the plant that receives 12 hours of sunlight will grow the most because if a plant receives too much sunlight, they can die, and the same with no sunlight or little of it. The independent variable is the amount of sunlight (0 hours, 4 hours, 8 hours, 12 hours, and 24 hours), while the dependent variable is the growth of the plants. The control variables will be the plant type, the location of where the sunlight is received. Same soil for each plant. Each plant will receive 6 oz. of water a day.
Procedures:
1. Set your 5 same type of plants into 5 same pots.
2. Fill all 5 pots with the same kind of soil, and same amount.
3. Give each plant 6 ounces of water at the very beginning, and do the same everyday at 12 o’clock.
4. Set 3 timers, one for each plant (0 and 24obviously does not need one). One for 4 hours, 8 hours, and 12 hours.
5. Set up a table that will hold your results. Have the independent variable on the left and the dependent of the top.
6. Every time one of the timer goes off, take the plant immediately into a dark room and record the height of said plant.
7. Wait until the proper amount of time has passed (if you take the 8 hour plant away, you must wait 16 hours until you place it back into the sun), and then place the plant back outside in the exact same spot as before.
8. Once you have concluded the experiment, make sure you have recorded all the heights for each plant.
9. Check if your Hypothesis was correct.
10. If not, then do some other research as to why one plant grew more than the other.