LED illuminant
for
Hartenberger Dive-Lights
For some of our underwater lamps operated with halogen light we offer
interchangeable LED modules (beam characteristic: spot reflector).
The functions of the lamp, such as power control, activation of the SOS
distress signal, and remaining burn time warning as well as total discharge
warning will be fully sustained.
The majority of the heat that is yielded by halogen bulbs is emitted
forwards through the reflector. Therefore, the beam is relatively warm.
However, the beam of an LED is almost cold. Therefore, the complete
heat of the light-producing semiconductor has to be dissipated "backwards"
through the printed circuit board / cooling surface.
In order not to destroy a high-power LED it should only be operated
for a few seconds without adequate heat-dissipation / cooling.
These circumstances demand an increased constructive effort in order
to ensure the necessary heat-dissipation / cooling.
An overload protection prevents excessive overheating of the high-power
LED if cooled down badly, and lowers the power consumption.
What are the advantages of an LED-light?
An LED has an extremely long life span. It is considerably longer than
that of a halogen bulb.
The LED is hard to break and very durable.
The cold white (bluish) light of an LED is not as strongly absorbed
by the water as the warm white (reddish) light of a halogen bulb. Therefore,
underwater an LED light has a greater range.
Due to the individual perception (only in dark environments!), cold
white LED light seems to be stronger than warm white halogen light.
What are the disadvantages of an LED-light?
Fairly high costs of the LED and the necessary electronics.
Bad rendition of the red colour.
Conclusion:
We recommend the use of an LED-illuminant for night dives in freshwater,
for dives in murky and cloudy water and for cave dives.
Despite a rather low power consumption of the LED modules, a sufficient
brightness and a considerable longer burn time is achieved.
(siehe
Tomatentest)
