@Neryl, you cracked me up when I read your post ha-ha @lakshmi17, All jokes aside, if you want to go to the trouble of having beautiful pendant lights and your ceiling is so high, get a professional!!! Save up if you have to but it's the best way to go in this case, you might be surprised that it's not as expensive as the cost of the lights you intend to have fitted. I paid over $130 for each of the three lights I have bought to have installed over my dining table and I'm darn sure my electrician won't be charging me $400 to install them!!!

Pendant light choice would usually be for a specific purpose so if you will move things around I would have a rethink. It may be possible to have a pendant with a long lead & hooks for the cord that would allow you to move it within a reasonable distance of the connection point. Maybe some general lighting might work better e.g. or two or three directional spotlights along edges or the ridge line & on dimmers if possible. Subtle strip lighting at the top of the grey wall & the addition of a feature decorative wall hanging & potted plants would look nice too.

I love industrial too it's raw.. clean lines..our place used to be a shop..terrace out the front then they built an extension out the back to house the printers..hence the high ceilings..we visited Japan just before renovating this place thus the Japan render..pendants were made by one of our client to say thank you..court yard etc

I wouldn't go any lower than 600mm from the top of the bedside table. Ultimately the height would depend on the height of the bed and the size of the pendants you are using. Hope this helps, MKG