The 13th Annual Old-Lumens challenge- 2025- Official thread- Finished/Closed

[Ruckusmattster (Ruckusmatter)]

Ruckusmattsters 13th Old Lumens entry - machine made

A 1.6Mcd 2k lumen Fresnel lens spotlight full CAD: Onshape github: GitHub - ruckusmattster/laser_cut_spotlight this project utilises 1/4 inch laser cut wood, a 200mm diameter fresnel lens, and a sft42r to create a handheld spotlight featuring: a calculated runtime of 3 hours, an arduino nano as a BMS, and a constant current buck driver. short overview through photos: [PXL_20251219_001637656.NIGHT] [PXL_20251219_062128601.LONG_EXPOSURE-01.COVER] [PXL_20251214_083020571]

my entry thread - build is almost fully done except for a fun bonus feature. im just working on the writeup now and once i return to my dorm ill record a video of its use