Could you provide a link to the HD fixtures you like? I assume you're referring to the ones identified as "linkable". There are quite a few available from them.I like the LED shop lights at Home Depot as you can directly connect them together to form as long a fixture as you need. I plan to use these in my Georgia house shop.
That's not a bad deal Chas and they are only slightly more on Amazon Canada https://www.amazon.ca/gp/product/B00S5OA1U2?ref_=oh_aui_detailpage_o01_s00&redirect=true&psc=1&tag=vs-home-convert-amazon-20&pldnSite=1 It's interesting that they can be run with the T8 ballast and input an extra 4 watts that way or as you say they can be bypassed. The 2200 lumens is fairly bright. I had a chance to check out some led fixtures recently where someone I know was switching out his T8s and the lights were bright and the light quality was excellent. That was all something that was being discussed about the new leds a few years ago when this subject first came up was would they be bright enough but that's not an issue any more. They are as bright or brighter.I have replaced all the T-8 fluorescent tubes in my shop with these from Hyperikon.
They are less expensive than those I found at the local home improvement store. You have to rewire the fixtures, but that takes about 5 minutes with the enclosed instructions.
Could you provide a link to the HD fixtures you like? I assume you're referring to the ones identified as "linkable". There are quite a few available from them.