The lunar-white light repeater FB-08 (hereinafter, FB-08) is designed for installation in the tunnel of the underground. FB-08 is made in a sealed case made of ABS-plastic or analogue.
The housing has a bracket for installation in the underground tunnel. On the front and back sides of the case there are windows with white frosted glass.
The lantern is illuminated from both sides simultaneously. At the bottom of the case there are: 2??18 connector for power connection; two switches inside a small hermetically sealed plastic box to adjust the brightness of the luminescence.
To access the switches, it is necessary to unscrew the four captive screws and remove the cover. Three combinations of switch positions change the brightness of the FB-08.
The maximum brightness is set when both switches are on, the minimum brightness is set when both switches are off. Only the number of switched on and off switches matters, and their order does not matter.
To switch the lantern on, the power must be supplied...
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