Shipping on anything long like 1100mm long is gonna be about 3 times more than shorter products (like 500-600mm.)
It's easy to price it out and compare with things like the Kingbrite W55 Quantum bar's where the 1100 is just (2) 560 strips on a longer heatsink:
Main products Led grow light, bar grow light and 195 more Products from Shenzhen Kingbrite Lighting Co., Ltd. on Alibaba.com
kingbriteled.en.alibaba.com
Main products Led grow light, bar grow light and 195 more Products from Shenzhen Kingbrite Lighting Co., Ltd. on Alibaba.com
kingbriteled.en.alibaba.com
I suspect the same issue will apply with every vendor selling light bar format fixtures.