We went in August of this year to these gardens, these were the nearest ones to where we were staying. On a Thursday evening they open until late and the paths are lit by candlelight.They are well worth the visit but I would arrive before it gets dark and it does get very busy and when we left at just after 9pm they were still queuing to get in. There is a fair amount of walking and some is uphill. There are bands playing in the gardens and a childrens play area. My advice to make the most of the evening visit get there early so you can leisurely stroll to far end and get the views in the light and then walk back in the candlelight.