Light levels

[Dagon]

Hello everyone.

I am a complete novice to fish keeping. I set up my tank about a month ago (53 lt, planted, community species). It is lit with a single LED tube.

During routine maintenance I realise the light tube can be rotated, which significantly increases the light level. As you might guess, it makes the tank look great,

My question: is it ok to have the tank at its brightest?

Will it stress the fish?

What are the positives/negatives for the planting?

It would be great to get some guidance.

Thanks.