Its been a few days since I updated the thread. I have not really touched the lights since my last post. All the tanks inhabitants seem to like or at least not mind the new lighting.
I have taken some time to compare my amp draw from before the light change to now and quite frankly, I am a bit surprised by just how much less power I am using. Having the Apex really makes it easy to compare.. The halides used about 6.2 amps.. With the leds at my current settings of 65% white, 40% blues and 20% power to the royal blues, the leds are drawing a whopping 2.2 amps and providing so much more light to the tank that I am kind of astonished! I will be acclimating the tanks to the lights for the next month or so and come first of the week will start to increase the power a bit. I dont expect I will ever get near 100% on any of the lights so I should still see at least a 50-60% savings in that power alone.
In this screen capture from the apex graph of a seven day period the blue line on the graph is the power bar that had the metal halides and the red line is the power bar that now has the led's. You can see where the power dropped off from 8.3 to 2.1 amps when the halides were removed. That 2.1 amps are the other devices on that bar. The blue line kicks in at about 3.3 amps for the first day and part of the second until I dialed it down a bit to its present 2.2 to 2.3 amp draw for acclimation and color.
On the subject of power, I just got a new JBJ Arctica 1/2HP chiller. My plan is to install it tomorrow. My existing West Coast Aquatics 1/2HP chiller has provided me flawless faithful service for several years but it also uses 10.4 to 10.8 amps depending on the time of day and how hot my garage (where the chiller resides) is. The Arctica is rated at 5.1 amps max. My chiller turns on 6-7 times a day for about an hour. Dropping the temp from about 80 to 78.5. I just hope the Arctica proves to be as efficient as its rated and is as quick to cool my tank and equally reliable. If so, I should see an appreciable savings there as well.
Im sure some of you are wondering how much the LED's reduced the temp of my tank..
The LED's dont spare me much on the heat because my light soffit is well ventilated with a large duct fan sending the heated air outside through a vent. Even with the halides, it stayed cool in the light area. I think much of the heat is due to the lack of ventilation under the tank and the pair of 65watt fuge lights built into the fuge lids. My next plan is to add a duct fan below the tank and vent it outside as well. That will eliminate most if not all the heat generated by the lights and pumps. I also plan on modifying the fuge light fixtures so I can use lower wattage bulbs. The only other potential heat generators on my tank would be the hammerhead and dart pumps, 114 watt UV as well as the two Red Dragon Pumps running my skimmer All things that will benifit from adding a good exhuast fan down below.
Back on the subject of power.. Looking back to about a year ago just prior to installing the new sumps and and replacing all of my other pumps to just prior to the LED change, my power bill dropped by upwards of 50% as a result of the pumps alone. With the LED change and the chiller change, that will spare me quite a bit more.
Once the chiller is in and the fuge lights are modified, I have a dart gold pump to replace my existing standard dart recirc pump. That wont save me much on power but it will bump my recirc flow a decent amount. The standard dart will become the backup. I am also planning a hammerhead gold to replace my existing hammerhead return pump with. The hammer head gold uses a fair amount less power (50-60 watts) than the hammerhead I have now. My existing hammerhead will become the spare return pump.
When I am done with everything, I estimate that I will have reduced the power usage of my tank by over 80% in the last 15 months. That amount to several hundred dollars a month in electricty which really makes me happy!