We only play at night during summer.
You don't need a torch nor an expensive set of NVs. Yes they make life easier in some situations but for the most part you won't use them (too many retards flashing powerful torches everywhere and there is a high risk of damaging the image intensifier tube, at the same time so many retards flashing powerful torches and giving away their position).
As others have said, it's a completely different game, you see with your ears, not with your eyes.
So every movement is amplified by 100, a piece of kit that is loose and rattles is like running around with a bright neon sign over your head, so is stepping on a twig.
You will learn how to properly walk in the woods, heel first and then the external part of your foot, this to minimise the chances of breaking twigs and leaves.
Close encounters are the norm, if someone's staying still you won't notice him/her.
Make sure your gear is tight, straps are tucked in and taped, silence any metal bit like a sling mount with tape, boot laces tucked in, any cable firmly secured. Also know your kit, routing through all your pouches to find a magazine isn't a good idea in general, more so when you can't see shit.
If using a torch, it's good practice to move as soon as you turn it off, your opponent will be blind for a couple of seconds and will most likely fire in the direction of the light, but if you aren't there anymore, he won't hit you.
Don't be tempted to use your torch against a close range bush, it'll only blind you and you won't see shit anyway.
Don't be like me, use clear lenses!!
Don't wear black, it's super obvious unless you are in a pitch black area, and even then green is much better. Tan/fde stands out a lot too.
Don't look directly at things, the way the eye works makes it easier to spot things while not looking directly at them (cones and sticks, something something, I'm not a medic).
Speaking of NV: having a set won't make you able to see everything as if you were in full daylight, you need to learn how to use them.
It's very far from the perfect picture you see in movies, depending on the generation. You still look for disturbances in skylines, patches of different colours, humanoid shaped blobs.
Having an IR illuminator does wonders, but only if nobody on the opposing team has nods, otherwise he'll just see the beam and know where you are.
Built-in illuminators suck.