Final answer:
The missing information to determine the mass of the light bulb in the triple beam balance simulation is the mass of the light bulb itself.
Step-by-step explanation:
To determine the mass of the light bulb in the triple beam balance simulation, we would need to know the mass of the light bulb itself. Option A is the missing information. The other options - the length of the triple beam, the type of material in the light bulb, and the gravitational acceleration - are not directly related to determining the mass of the light bulb in the simulation.