This is a great, insightful contribution to our forum. Some thoughts in response: If you are finding it difficult to wake up on schedule, it’s a sign of that you have gained only partial effect. We want it to become easy to wake up at the target time. You might achieve this by increasing your light dose with higher lux (but please, not above 10,000 lux) or longer session duration. If the session gets as long as an hour, take a brief break in the middle for some stretching. Second idea: Short of using a dawn simulator, attach your bed lamp to an electronic appliance timer set for 15 minutes before wake-up, and then proceed to the bright light session. If you find the bedside light disturbing, stop using it. Third idea: Take a low-dose melatonin capsule (not more than 1 mg) in the evening 12 hours before the scheduled light session. This should reinforce the phase-shifting effect of morning light without making you sleepy immediately. Thus, you’ll go to sleep about four hours after taking the melatonin if you are an eight-hour sleeper. If the melatonin disturbs your sleep, stop using it. You are correct: once you slip later, you should not resume the lights at the target time, but rather edge earlier over several days from when you are waking up. Finally, during the four hours before bedtime, keep your room lights low-–just comfortable enough for reading, socializing and watching TV–and avoid exercise and stimulating work activities that can contribute to difficult sleep onset.