@valhalla flint and steel make sparks, which have to be caught in or on something which then catches fire. Lighting a candle or lamp with flint and steel often involves lighting char cloth or very slim tinder and then using that to light the wick. Using something like a fire piston might work better than loose flint and steel.
@valhalla
...which is why my answer to you was "Lighting a candle or lamp with flint and steel often involves lighting char cloth or very slim tinder and then using that to light the wick."
Having watched videos of people doing this online, I'm not seeing them using large bundles of dry grass.