The type of light distribution for indoor lighting is not specifically defined. In road lighting, both CIE and IES define types based on a combination of forward and lateral distribution of light intensity.
IES forward distribution type:
It is determined according to the position of the spot trajectory delineated by the 50% light intensity of the luminaire and the forward and backward distance of the installation point of the luminaire.
Class I: <1.0MH
Class II: 1.0-1.75MH
Class III: 1.75-2.75MH
Class VI: >2.75MH
IES lateral distribution type:
It is determined according to the left and right distance between the position of the beam axis of the lamp and the installation point of the lamp.
Very short: <1.0MH
Short: 1.0-2.25MH
Medium: 2.25-3.75MH
Length: >3.75MH
CIE forward distribution type:
It is determined according to the position of the spot trajectory delineated by the 90% light intensity of the luminaire and the forward and backward distance of the installation point of the luminaire.
Narrow extension: <1.0MH
Medium extension: 1.0-1.4MH
Wide extension: >1.4MH
CIE lateral distribution type:
It is determined according to the left and right distance between the position of the beam axis of the lamp and the installation point of the lamp.
Short projection: <1.7MH
Medium projection: 1.7-2.7MH
Long projection: >2.7MH
Edit: Sophy
Diode TVS (Transient Voltage Suppressor), also known as Transient suppression diodes, is widely used a new type of high efficient circuit protection device, it has a fast response time (the nanosecond) and high surge absorbing ability.When it ends of stand moments of high energy shock, TVS can bring the two ends at high rate from high impedance to a low impedance between impedance values, to absorb a large current moment, put it at both ends of the voltage restraint on a predetermined value, thus protecting the back of the circuit components are not affected by the impact of the transient high pressure spikes.
Silicon TVS / TSS
Silicon TVS Transient Voltage Suppresso,Silicon TSS Transient Voltage Suppresso
YANGZHOU POSITIONING TECH CO., LTD. , http://www.yzpst.com