colour????

Mike

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Yes, the colour - or kelvin rating - matters enormously, whilst corals prefer lower K rated lamps (or natural sunlight) to grow, this makes the water look very yellow and encourages algae growth, aquarists prefer the look of 10,000k or above for a crisper, slightly blue white light.
 

Tobes

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hey guys does the colour of the bulbs realy matter or not i have 4 t8 bulbs
If you're planning on keeping corals, you need to replace the T8's with stronger lights eg T5's or metal halides.
 

Kanga

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This might help


Light Source Color Temperature (° Kelvin)
CANDLE FLAME 1500
INCANDESCENT HOUSE LAMPS 2500-3000
60-WATT,GAS FILLED,TUNGSTEN-FILAMENT LAMP 2800
100-WATT, TUNGSTEN-FILAMENT LAMP 2865
500-WATT, TUNGSTEN-FILAMENT LAMP 2950
1000-WATT, TUNGSTEN-FILAMENT LAMP 3000
500-WATT PROJECTION LAMP 3175
3200 DEGREE KELVIN FLOODLAMP 3200
AMBER FLASHLAMP (EXCEPT 25C) 3200
R32 REFLECTOR FLOOD 3200
ZIRCONIUM CONCENTRATED ARC 3200
WHITE,NO.1,NO.2, OR NO.4 FLOODLAMP,REFLECTOR FLOOD 3400
REFLECTOR FLOODS (EXCEPT R32) 3400
WARM,WHITE,FLUORESCENT LAMP 3500
SHREDDED-FOIL, CLEAR FLASHLAMP 3800
COOL,WHITE FLUORESCENT LAMP 4500
DAYLIGHT(BLUE)FLOODLAMP 4800
WHITE-FLAME CARBON ARC 5000
M2B FLASHLAMP 5100
MEAN NOON SUNLIGHT AT WASHINGTON D.C. 5400
HIGH-INTENSITY SUN ARC 5550
DIRECT SUNLIGHT IN SUMMER MAY RISE TO, OR EARLY OR LATE ON A WINTER DAY MAY DROP BELOW, 5800
DIRECT SUNLIGHT BETWEEN 10 AM-3PM (AVERAGE) 6000
BLUE FLASHLAMP 6000
DAYLIGHT FLUORESCENT LAMP 6500
SUNLIGHT PLUS LIGHT FROM CLEAR SKY AT NOON MAY RISE TO 6500
LIGHT FROM OVERCAST SKY 6800-7000
HIGH-SPEED ELECTRONIC FLASHTUBES 7000
LIGHT FROM HAZY OR SMOKY SKY 7500-8400
LIGHT FROM CLEAR BLUE SKY 10000-27000
 

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