It's just a simple tool telling you the light levels of a position you're pointing at. Probably only usefull to mod developers, but may be usable for farmers too.
Water meter tells you if there's a water node within distance of 1-5 at same height or below pointed node.
lightmeter is crafted:
glass
stick
water meter is crafted:
glass
glass
stick
http://www.mediafire.com/?ikmuim5ljyh8g2b (Version 0.0.2)