Well recommend
I bought these lights for my 6ft slim Xmas tree. As I have a cat that eats cables these were ideal hence no dangling wires. Just covered the front of tree as had in a corner. Very bright for battery lights and economic. Would highly recommend.

Brilliant price for a great product.
The price was incredible and there are 11 modes to change the lights from colour to soft light. I haven’t added stars for the timer as I’ve not used that function. At a price for under 6 this was a fantastic buy. It lights up my purple Christmas tree. Thank you, I would definitely recommend this product. Oh and it was delivered very quickly.

Best fairy lights ever!!!
After reading the reviews I went ahead and bought these and they are lovely. Just bought the 100 led ones and they fit my 4ft pencil xmas tree just right. They have all the different functions and brightness and come with a remote. What else would you want …oh yes the price all for under 6. Definitely would buy again. 5 sta

Lovely bright lights with a mind of their own!
EDIT: I was contacted by Ollny customer service who provided a free replacement.

I have changed my review from 3 star to 5 star because of the pro-activity and quality of the customer service, and after 5 days of testing, the replacement lights are working as expected. Thank you Lucy!

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Impressed with how bright these lights are, lovely colours and nice lighting options.

Not impressed with the timer – it is useless – set it to 8:16 and it will turn on and off at random.

The lights also get bored with being in the same light mode and after about 4 hours will change to a completely different mode, and then change again a few hours later.

It’s a good job I’ve put them outside where I can’t really see them because they would drive me nuts!

Pretty enough lights
Each light seems to be a pair of a “warm white” LED and a color one, with those in a repeating red/green/yellow/blue sequence. The wire’s white/clear coated plastic and seems about as tough as I’d expect christmas lights to be—fine to cope with being hung up and falling down a couple times if you mess up.

The default pattern when they come on is a alternating fade at different speeds been white and color, and it’s pretty nice, so I’ve mostly left the other modes alone and just have these running off a wall socket with a phone charger to power them. (You will need one with a socket, not a cable, and possible an adapter from USB-C to A.)

All the patterns are variants of when they’re white vs when they’re color; they will never, for example, only light the reds and yellows without the greens and blues. No chaser effects or anything like that—because every “bulb” has a white and a color LED, they’re all turning on or off together. Some settings turn both sets on together to make a pastel blend.

They do smell weird coming out of the box. This seems to be slowly passing so presumably some residue from manufacturing. You might want to air them a bit before hanging them up.