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I had 8 x R80 E27 bulbs mounted on a 5 metre high ceiling. After a lot of research and thought, I found the cheapest, easiest and safest way was with the Stauber bulb changer on a 5 metre length of pine from Bunnings (25x25mm) for $7.30 Replkaced all 100 watt bulbs with 10 watt LEDs. I bought the full kit with 3 bulb changers. No dramas.