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G4 9xSMD COOL WHITE 8~30vDC – #1970
Trusted and reliable 5050SMD used in this bulb issued in 2018.
Has been updated but still very popular.
Diameter – 28mm
Total Length of pins – 15mm
Thickness of circuitry – 6mm
Length of pins after circuitry – 9mm
Operating voltage – 8~30vDC (12vDC and properly regulated 24vDC systems)
Current control – constant current driver
Quantity of LED – 9 of the 5050 type SMD LED
Lumens output – 120lm
Viewing angle – 120°
Colour – Cool White
Colour temperature – 6000k
Life expectancy – 50,000 hours
What is the difference between Warm White and Cool White?
Warm White has a pleasant incandescent tone to the light whereas Cool White is a plain paper White.
The human eye naturally doesn’t see Warm White quite as bright as Cool White.
In real terms a Warm White bulb has about 90% of the lumens efficiency of a Cool White unit.
The bad news ends there for Warm White bulbs.
Over the years we’ve seen a slow transition towards Warm White mainly due to the fact that Cool White got itself a black eye from the early LEDs going blue tinged.
In short – ladies far prefer Warm White to Cool White.
The men prefer Cool White as it is a slightly brighter work light.