I didn't have any luck finding a copy either, but there is a booklet Yorkshire Surnames Series 3 - Halifax & District by George Redmonds
Here is my take on the Lightowler name
The name Lightolres and it's variants, in the author's opinion, is derived from the phrase 'Lea of the Olres' (Alder's). Local dialect corrupts this to Lea o' t' ahlers and then Lea't'ahlers in exactly the same way that the name Lightowlers is pronounced in the same dialect.
It has been propounded that the name derives from a place where there is a light or sparse covering of Alder trees as opposed to a dense growth. The author disputes this on grounds that the Alder is a pioneer species which requires lots of light and grows in wetland regions. Although there are wetland areas dominated by Alder where the growth is known as an Alder Carr, there are no areas where the growth could be said to be 'dense' and therefore by inference it would be pointless to have an area where Alders were 'sparse'.
I've sent you a PR re email address
Dave