Fixed that for you. It is light stress, for quite some time too.
Op either raise your light height or lower your intensity. You're giving her more than she can handle at her size.
Key is to keep your humidity up until they root. Use a clear dome or something similar to keep in moisture. For faster rooting, use a heat mat hooked to a thermostat probe in your soil. Set it to 75 F and you should see roots within 10 days or so.
According to your link, the manufacturer says the light should be at a height of half a meter. So, about 12 to 15 inches. It would help with the internodal spacing I believe.