I have no experience with Lightflow and I obviously do not have my GSIII yet however screen awakening settings are usually on an by-app basis. Depending on your messaging and email client there usually is a "screen on" toggle. That would be my first guess. Although the stock "Notifications" settings menu is pretty robust so try there too!
Sorry I can't be more helpful. I will do more gooder next time.
Check out NOLED. it's made for devices that don't have LEDs, and will use a touch of battery, but phones with LED based screen technology do better than others because of the blacks not requiring power. Either way it puts a logo on the screen which is unique to each type of message so you can instantly look and see what if anything is waiting.
to get rid of it (after googling around) I had to download a third party text app to replace the original(like Handcent or gosms) and there are options in there to turn off the display pop notification. It was annoying the heck out of me but apparently there isn't a way to disable it from the stock text app.
Just turn it over No I'm just kidding this can be annoying or beneficial, but I'm thinking the only way to do it is download a 3rd party app and turn the "screen on" setting off. You'd likely have to disable stock sms notifications altogether to make it work and use the 3rd party app. They work great and if your problem is serious enough you wont mind the switch. Or option two you could put an nfc tag on your nightstand and program it to turn off notifications. That's what I would do
I found some settings in the text app that might help you, but I did not see anything to make the screen stay off.
Let me know if you find a way but for now it's just like 2 sec. so I don't mind it that much. but I would like it to vibrate longer when a text comes in.