There have been a number of threads about "light" roast coffees that kind of went off kilter in a contest of "that's not light, this is light."
The biggest problem being a lack of measurable references available to home coffee enthusiasts. There are industry standards for degree of roast and how to gauge it by color. There are two different Agtron scales, Agtron being a vendor of electronic color metering instruments specifically for measurement of coffee and other food items. These instruments are intended for labs and industry and are quite expensive. There are also sets of color tiles available from the SCAA for about $300. I'm considering purchasing a set for myself. Just seems like a lot to pay for what amounts to 10 paint chips.
It is absolutely impossible to compare photos of different coffees taken with different cameras at differing times under different lighting conditions. It's been tried and that goes absolutely no where.
Among the coffees that did get mentioned as "very light roasts" repeatedly, were Leam Hammer and Gotham Degrees North.
I tried Leam Hammer and really liked it, but got into that whole, "that's not really light" thing posting about it. I found it worked quite well with my rig: Monolith Conical and Linea Mini, in spite of the conventional internet wisdom that holds it impossible for conical grinders and espresso machines with no pre-infusion to do so.
So I thought I'd post this comparison of two well known coffees, under the same lighting conditions, with the same camera at the same time for visual reference:
Attached are samples of Counter Culture Coffee Hologram, roast date of 3/18/2019 and Gotham Degrees North 7.34 by 2.94, roasted 3/27/2019. Photo taken side by side, iPhone X under remote-phosphor LED 93CRI 2700k lighting.