pansy seedling/plug

i went to water the seedling stroke plug and i have noticed tht the leaves are a little brownish(not all justin parts aswell) and just wondered what it was , is it too hot too cold? any help good help , cheers,

 

It could be water droplets on the leaves acting like a lens and the sun coming through the 'lens' and burning into the leaf. A snap would help a great deal. Cheers, Tony.

 

I shall sort 1 out today for you . That does sound like it could be that tho as there is a lot of water on the inside of te roof which I usually tap off which will land on the plants