In meditation, the first time I saw the purple light, I was so excited and had a joyful feeling. I played with this light and then opened my eyes. That was the end of that meditation. Little did I kno wthat it was merely an indication that I was entering deep meditation. I thought seeing that light was the goal.

You might see or feel one of the following which will distract you from continuing meditation.
(1) mental visions of brilliant or bright light
(2) arising of rapturous feelings
(3) arising of feelings of calmness
(4) strong devotional feelings relating to Buddha and Dhamma
(5) great enthusiasm to carry out the practice of meditation
(6) joyful feelings
(7) extremely rapid, clear and purified perception of senseobjects
(8) the capability of practising mindfulness without missing to note any sensation that needs be contemplated.
(9) the capability to contemplate automatically without making particular effort.
(10) feeling of subtle pleasure in the contemplation.

"The meditator (disciple) is so much encouraged and elated that he cannot remain mute and cannot help recounting his experiences. After having come to this decision if the contemplation is carried on in continuity, those feelings of contentment and satisfaction and mental visions of light will gradually decrease, and the perception of the objects will become clearer and clearer with awareness. " Source : http://www.yellowrobe.com/practice/meditation/228-way-to-nibbana-through-vipassana-meditation.html