Ca++
Well-known member
Not really the right thread, but cob's are thermally limited, in development terms. It's such an energy dense package, that they run hot. We need to run cool to get best efficiency. We moved away from them, as passing 150lm/w was looking like a brick wall. Making 2umol/w a difficult goal. Meanwhile, individually packaged low power LEDs were moving towards 200lm/w and 2.5umol/w. This left the cobs in the compact lighting market. Things like flood lights. While the energy efficiency of little LEDs, with a good share of metal to dissipate their heat, moved ahead. Today, some of the biggest LED names we never heard of, are knocking out LEDs past 2.5umol/w for never heard them prices. That is where this thread has it's roots.
Be aware, that often we get named LEDs and a measured output that sounds good. However, not providing enough metal, means in 5 minuites time they won't measure the same. This is perfectly legal. As is measureing their output in a coldroom situation. This is why we like to look at the spread of light over an area, and the parts used. Without us focusing purely on the efficiency stated. It's just too easy to fake it.
Be aware, that often we get named LEDs and a measured output that sounds good. However, not providing enough metal, means in 5 minuites time they won't measure the same. This is perfectly legal. As is measureing their output in a coldroom situation. This is why we like to look at the spread of light over an area, and the parts used. Without us focusing purely on the efficiency stated. It's just too easy to fake it.
>>>best
