LedNedbv. Founded in 2004 Headquarters Helmond Netherlands LedNed ’ s global reach 120 employees various companies in 7 countries Dutch design & engineering Worlds first & only KEMA CE Specialized in functional White Light LedNed Global NLT &LedNed Asia Zenith LedNed USA LedNed Middle East
LedNed strives to be the leader in functional white Led, in principle based on retro-fit, focussed on the B2B market with a active spin off towards the consumer market (part of the range is suitable for consumer market) .
Oleg Vladimirovich Losev published in 1927 about light emission of diodes used in radio transmitters.
The currently used Light Emitting Diode (LED) is developped in 1962 by Nick Holonyak jr. (General Electric) Although he is generally viewed as the person who invented the LED, as shown other people have published about the same phenomenon.
AC power flow has the three components: real power (P), measured in watts (W); apparent power (S), measured in volt-amperes (VA); and reactive power (Q), measured in reactive volt-amperes (var).
The power factor is defined as: P / S
(λ= P/S )
In the case of a perfectly sinusoidal waveform, P, Q and S can be expressed as vectors that form a vector triangle such that: S 2 = P 2 + Q 2
If φ is the phase angle between the current and voltage, then the power factor is equal to |cos Φ |, and: P = S . |cos Φ |
Since the units are consistent, the power factor is by definition a dimensionless number between 0 and 1. When power factor is equal to 0, the energy flow is entirely reactive, and stored energy in the load returns to the source on each cycle. When the power factor is 1, all the energy supplied by the source is consumed by the load. Power factors are usually stated as "leading" or "lagging" to show the sign of the phase angle.