The actual glow of the tungsten is a result of photons being released as tungsten energy state changes caused by the flow of electrons. And so essentially the glow is directly caused by the amount of electrons passing through.
If we're comparing electrical circuits to water flow, then the water flowing through the pipes would be the current, the size of the pipes represent the resistance, and the voltage would be the gigantic water tank source from which the water flows.
The more water in the tank, the more pressure those pipes have for water to flow through them, however you could have a huge water tank and only have a trickle flow of water if the pipes are too small. The effect of increasing the water tank size will cause more water to flow through the pipes, and as we mentioned earlier is comparable to our lightbulb receiving more current and therefore glowing brighter. What happens if we increase the water tank size and replace the pipes with smaller ones? Increased pressure causes more water to flow, but the flow is limited by the size of the pipes, so they cancel each other out.
What does this mean? Voltage in of itself does not increase light bulb brightness, but voltage with no increase in resistance does. Ultimately what is representative of the brightness of the lightbulb is simply the current passing through, regardless of voltage or resistance. Voltage and resistance only cause an increase or decrease in brightness because they directly influence the amount of current passing through.