In reply to Wingnut:
I’ve got a Coleman festival blackout tent which I got - having never been to a festival - for general camping specifically to deal with the issue of making sure kids can sleep when it’s light outside.
it’s a 2-3 person dome, and apart from obviously being less well made, I haven’t yet found any obvious difference in terms of temperature, waterproof ness etc than my quasar.
So for what I bought it for it has been brilliant, although only used so far in the garden and the odd night on dartmoor, and never on a scorching day