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wilrock101

Experienced Reefer
Location
YONKERS/PA
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whats up guys. I have a question, I have 250 watt metal halide on icecap ballast.I like the soft and slow start up when the lamp comes on with my timer but I dislike when its time for then to shut off,that its done instantly. Has any one used dimmer controled by timer for slow dimmed shut off.
 

bad coffee

Inept at life.
Rating - 100%
27   0   0
Most ballasts don't like to be dimmed. You have to buy special ballasts that have a seperate dimmer circuit included.

You could try actinics or just t5's that come on shortly before your MH's go off. then they can go out later. It's not quite a fade, but a step to dark.

B
 

Wes

Advanced Reefer
Location
Raleigh, NC
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6   0   0
they can be dimmed...

there is a high tech dimming ballast that is supposed to give natural sunrise effect and other cool things like simulated clouds passing by, etc...but it will cost you about $1100 a piece...

ACLS - Advanced Control Lighting System

Sfiligoi's ACLS can reproduce the natural biologic cycle of the sun, day/night and the seasons on the aquarium habitat: so the passage from daylight to dusk is very gradual and consequently there is no shock for the animals and invertebrates in the aquarium.
During the sunrise-sunset phases the dimmer reduces the power the lamp absorbs and consequently grants high energy savings in comparison with common ferromagnetic reactors with a 92% rent.
The electronic dimmer keeps the light flow extremely stable to avoid flickering problems of exhausted lights (250 Hz using squared wave). You have the possibility to use also lamps almost exhausted with a fairly good light flow (the bulb duration increases of 30-40%). Further, after the tension falls, ACLS allows turning on of the lamp reducing the time by 50% in comparison with common ferromagnetic reactor.

The opinion of the experts in field is that the creation of the natural conditions of sun and moon light, and in particular of the moon phases, could help the reproduction of the aquarium guests, especially of the invertebrates.

Special dip-switches control the duration of the sunrise-sunset effect which can be personalized the duration of the maximum lighting flow (“midday”) the moonlight latitude longitude cloudy days reduction of the lighting flow reduction of the lamp power standard timer for HQI lamps (output relay) timer for actinic tubes (output relay) timer for moon phases lamp (using a suitable bulb) the watch/datary-timer into the ACLS (day/month/time)
 

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