For streetlightings 100 lumen/watt is pretty standard in 2016. Manufacturer are moving to 120 lumen/watt total SYSTEM lumen this year.
To get the most efficient yet as high as possible CRI to the end user, most manufacturers (including Nichia) have been decreasing chip size. Some goes to small chips meant to reduce intensity and better spread of lighting spots, some forms big COB with much higher voltage at very low current.
For example the 757, E17A, and E21A is Nichia flagship at the moment for it’s (own) record breaking efficiency while maintaining one of the highest efficiency AND CRI in the class. AFAIK, Yuji LED still has the best colour quality but suffers with it’s poor efficiency (60-70 lumen/watt is typical).
Acebeam EC50 II Mod mit Nichia 144A 4500K high-cri
Letztes Jahr habe ich mit Freude die Zebralight SC600Fd MKIII Plus erwartet, da sie theoretisch die perfekte Zebralight hätte werden können. Das war sie in meinen Augen dann aber doch nicht, was hauptsächlich an der niedrigen Lichtstärke und dem...