This is the one I use for both throw and lumens: ebay-New-Digital-200-000-Lux-Light-Meter-LX1330B, for $33 w/shipping from US. Several of us have the same meter. I got a PVC pipe based light box, think first made popular by TurboBB.
TurboBB thread: https://budgetlightforum.com/t/-/6918
More lumens.lightbox info: https://budgetlightforum.com/t/-/20730