Do different amounts of volts and amps matter if the end wattage is the same?

I am in possession of two 12 volt 10 amp batteries. When connected in sequence they produce 24 volts and 10 amps which are a total of 240 watts. With

I am in possession of two 12 volt 10 amp batteries. When connected in sequence they produce 24 volts and 10 amps which are a total of 240 watts. With this I am trying to power a 240 watt t5 halogen bulb rated at 30 volts and 8 amps. If i power the halogen bulb with 24 volts and 10 amps will it work as effectively as if use 30 volts and 8 amps?

or:I am in possession of two 12 volt 10 amp batteries. When connected in sequence they produce 24 volts and 10 amps which are a total of 240 watts. With this I am trying to power a 240 watt t5 halogen bulb rated at 30 volts and 8 amps. If i power the halogen bulb with 24 volts and 10 amps will it work as effectively as if use 30 volts and 8 amps?

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