Jeanne
I used a light machine years ago. I enjoyed the flashing lights synchronised with the various sounds, but like Holosync, the device invariably made me fall asleep and I only woke up when the lights went off. I still enjoyed using the machine though but I wasn't sure what benefits I was receiving other than 20 or 30 minutes sleeptime. Nonetheless it is something I would suggest is worth a try.
Regards
Stevie
