If you've shopped for a work light lately, you've seen “COB” everywhere. It sounds like a new technology, but it's really a different way of packaging LEDs. Here's what it means and why it matters for the light you buy.
What is a classic LED flashlight?
A traditional flashlight uses one (or a few) small, very bright LED emitters sitting in a reflector or behind a lens. The reflector gathers the light and pushes it forward into a beam.
Great at: throwing light a long way. Not great at: lighting a wide area evenly — you get a bright center and a dim ring around it.
What is COB?
COB stands for chip on board. Instead of one big emitter, dozens of tiny LED chips are mounted side by side on one board and covered with a layer of phosphor. The result looks like a single glowing panel.
Great at: soft, wide, even light with almost no hot spot. Not great at: throwing light long distances.
Side by side
- Beam: LED = focused spot. COB = wide flood.
- Best distance: LED = across a yard or down a trail. COB = arm's length to across a room.
- Glare up close: LED = can be harsh. COB = gentle and even.
- Shadows: LED = hard shadows. COB = softer, fewer shadows.
Which should you choose?
Choose COB for close, detailed work
Engine bays, under-sink plumbing, electrical panels, tents and cabinets. A wide COB flood shows you the whole job instead of a small circle. See the Floodline headlamp or the Fold 360 work light.
Choose a spot LED when you need distance
Checking the back fence, finding a trail marker, signaling. A tight beam gets there.
Or get both
Many of our lights combine the two: a COB flood for close work and a small XPE spotlight for distance. The Halo 230, Pivot and Slate all switch between flood and spot.
A note on color temperature
Most work lights use neutral-to-cool white (around 5000–6500 K), which makes colors easy to read. Warm white (around 3000 K) is cozier around camp. The Sentinel gives you both, plus red to protect your night vision.
Bottom line
COB isn't “better” than LED — it's better at a different job. For most people, most of the time, the job is close-up, and that's where COB shines.