This classroom experiment looked at whether changing how long bean seedlings get light each day affects how they grow. We used 24 bean seedlings and split them into two groups of 12. One group got eight hours of light daily, and the other got 12 hours. We watered every pot with 40 millilitres of water every other day and watched them for 14 days. Every pot had the same soil and stayed in the same room. The point of this was to practice reading a small dataset, not to come up with a universal rule for growing beans.

After 14 days, the average height was 11.2 centimetres for the eight-hour group and 13.6 centimetres for the 12-hour group. That makes a difference of 2.4 centimetres. Two seedlings in the eight-hour group grew yellow leaves, while only one did in the 12-hour group. None of the seedlings died. These findings suggest a possible link between light and growth under these specific conditions, but they don't prove that more light caused the height difference.

A few issues make it hard to interpret these results. We assigned seedlings to groups based on where they sat on a tray instead of using a random process. We didn't record the starting height of each seedling, so the groups might have been different from the start. We also didn't measure light intensity. Even though the groups were in the same room, they weren't the same distance from the lamp. Any of these things could have affected the final averages. The data we have doesn't tell us how much each factor mattered.

A future experiment should track initial height, assign seedlings randomly, and measure light intensity at every pot. It should also use more than one tray for each light condition. Repeating the work would help us see if the pattern holds up. While these results let us form a cautious hypothesis about light exposure, they don't tell us the best lighting schedule. Reporting these limitations is just part of explaining the results, not a reason to throw the exercise away.