Switched to LEDs, now having unknown issues with leaf curl

[Mr.furley]

One of the first things I noticed when switching from Hid to Led was the amount of foilage led produce and how much busier the plants were. From the limited info and pictures id agreed with the above information and add that your plants are transpiring to fast causing humidity problems at the canopy but a picture and more details would be need to suggest a hair cut.

[YYCannabis]

Light stress. Raise those lights up.

[gbauto]

Agreed.
Need some info on the grow-footprint and what are you using for your lighting fixture?
Also, ec and ph of your soluton.

[TOKABIGONE]

Light actual wattage from the wall, height above plants? Looks like light stress to me. Are you following manufacturers recommendation for height. Strong LEDS can give light burn quicker than HID even tho they run cooler to touch. Maybe nute issues too combined with light burn. What pH are you running? The more info we have the easier it is to help.

[bonghits4buddha]

Recently switched from an HID to LED lights. This girl is a recent clone from a batch of 10 or so. For some reason, since I started using LEDs, this sort of curling and discoloration has occurred. Never happened under the HID. It's a brighter light (potentially, it's dimmable), so tried increasing the amount of nutrients, which didn't seem to help. I can't find many examples of other plants that look like this. Any ideas what it could be?
They're hydro, using Ionic nutes with cal-mag and some silica. They're about a foot tall now, but have shown problems pretty much their entire life. The leaves just seem.... different, under the LED light.