from what i can tell cob leds direct the light much better, so instead of having regular leds that put the light out at all angles which means your actually wasting a lot of the light, cob sort of makes the light direct to where you want it, so if its pointing at the plants then the light is going on the plants so your not wasting light,
its basically directing the light a whole lot better to where you need it to, so this makes the light much brighter as its all going in the same direction instead of been spread out over a wider angle.
it makes the light a lot more efficient meaning your getting more light for your money.
here is some basic info on the light and what it does, not that exact light but this is about the technology in general, hope it helps, if not just do an internet search for cob vs regular led and you will find lots of info, but basically if the correct lense is used with cob leds then you will have a much more efficient light and this means more light to the plants, means more growth and more penetration so this clearly helps buds get much bigger as the light is penetrating into the plant a lot further
Why COB? --Background
LED(light emitting diode) is new technology with advantage of saving energy and very long lifespan. But all LED lightsource can not be faultless especially SMD, HP, flux LED etc. Compare to traditional lighting such as fluorescent lamp, as it is super bright in a small size, it cause uncomfortable glare. In case of no diffused optical lens used, such LEDs usually cause glare and zebra strips . But when optical lens or cover used, it will cause light loss when LED beam pass through this lens or cover.
How COB LED Light source works
COB LED is multi chips packaged, it can 10 times more increase lighting area, so it avoid uncomfortable glare by the maximum extent.
Lightspot use small size of chips to make COB LED package.
By now, for small size chip, ?some famous LED chip manufacturer can reach 249lm/watt @ 20mA. But big size LED chip can only reach 161lm/watt @350mA. The light efficacy decrease when chip size is bigger. Also when LED driver increase current to LED, the light efficacy per watt is even low.
The COB with small size chips will be a trend of LED light source package.
Lightspot holds the patent for invention for COB LED and lamp.
hope thats some help my friend,
also welcome to 420 magazine, have you got a grow up and running or are you planning on setting a grow up, if you do get a journal going and give us a shout and we can follow along.
peace