Which Lighting?????
- Thread starter Don Lino
- Start date
Warnberg
New member
400 watts is 400 watts, 400 watts of MH's put off the same heat as 400 watts of T5's
The only difference being is one is concentrated in a small area where as the T5's are spread over a larger area, but total heat out put is the same. I could go into the mathematical analysis to show you but it would take up some room to prove it.
I switched from 8 over driven (2 IceCap 660's) 54 watt T5's to 4 250 watt mh halide bulbs, my electric bill dropped 90.00 a month, plus when over driving the bulbs I had to change them about every 6 to 8 months. Why you ask, because in order to get the T5 light into the tank I had to run them very close to the surface of the water and my chiller came on several times a day. With the halide's I can back them away a bit, so I get better air flow through the hood and my chiller may come on once a day.
Just my 2 cents
WarDaddy
New member
NOT TRUE...
Florescent light bulbs turn more of their energy into light energy and less into heat energy.
MH turn more energy into heat, and that heat is focused on a smaller point, heating it more. Every try and burn a leaf with a magnifying glass...the energy hitting the surface of the lens is the same as hitting the leaf, but once focused, it transfers the heat more efficiently into the object.
T-5 spread the heat out, so it is more effectively disapated and not as much is adsorbed into the water.
Florescent light bulbs turn more of their energy into light energy and less into heat energy.
MH turn more energy into heat, and that heat is focused on a smaller point, heating it more. Every try and burn a leaf with a magnifying glass...the energy hitting the surface of the lens is the same as hitting the leaf, but once focused, it transfers the heat more efficiently into the object.
T-5 spread the heat out, so it is more effectively disapated and not as much is adsorbed into the water.
Warnberg
New member
1 watt = 1 volt X 1 ampere
1 watt = 3.41 BTU
so 400 watts = 400 X 3.41 = 1364 BTU's
Humm... I do not see an area figure in here.
British thermal unit
n. (Abbr. BTU or Btu)
The quantity of heat required to raise the temperature of one pound of water from 60° to 61°F at a constant pressure of one atmosphere.
The quantity of heat equal to 1/180 of the heat required to raise the temperature of one pound of water from 32° to 212°F at a constant pressure of one atmosphere.
So Like I said "400 watts is 400 watts, 400 watts of MH's put off the same heat as 400 watts of T5's
The only difference being is one is concentrated in a small area where as the T5's are spread over a larger area, but total heat out put is the same"
Total heat output from 400 watts of lighting will be the same...
It's kind of like would you rather have an elephant step on your foot with high heals on it's foot or bare foot?
1 watt = 3.41 BTU
so 400 watts = 400 X 3.41 = 1364 BTU's
Humm... I do not see an area figure in here.
British thermal unit
n. (Abbr. BTU or Btu)
The quantity of heat required to raise the temperature of one pound of water from 60° to 61°F at a constant pressure of one atmosphere.
The quantity of heat equal to 1/180 of the heat required to raise the temperature of one pound of water from 32° to 212°F at a constant pressure of one atmosphere.
So Like I said "400 watts is 400 watts, 400 watts of MH's put off the same heat as 400 watts of T5's
The only difference being is one is concentrated in a small area where as the T5's are spread over a larger area, but total heat out put is the same"
Total heat output from 400 watts of lighting will be the same...
It's kind of like would you rather have an elephant step on your foot with high heals on it's foot or bare foot?
How about VHO bulbs for actnics and MH... That is my impression of the best combo. Have they come out with a good T-5 atnic yet?
Dave,
I find your energy bill drop amazing by going to MH. Overdriving the T-5s must use some energy.
Cheers,
Chris
PS - I am staying out of the heat issue. (-:
Dave,
I find your energy bill drop amazing by going to MH. Overdriving the T-5s must use some energy.
Cheers,
Chris
PS - I am staying out of the heat issue. (-:
WarDaddy
New member
the easiest way I can translate this is the debate between Compact fluorescents and incandescent light bulbs:
From : http://www.energystar.gov/index.cfm?c=cfls.pr_cfls
* Use at least 2/3 less energy than standard incandescent bulbs to provide the same amount of light, and last up to 10 times longer.
* Generate 70 percent less heat, so they’re safer to operate and can cut energy costs associated with home cooling.
How can a florescent bulb that uses 13 watts of power make as much light as a 60 watt incandescent? One can only assume that the inefficient incandescent is taking the other 47 watts and converting them to HEAT.
Same thing goes with Metal Halide...the halide give you an intense focused light, but is also is creating more heat.
400 is 400, but lumes and heat are different.
From : http://www.energystar.gov/index.cfm?c=cfls.pr_cfls
* Use at least 2/3 less energy than standard incandescent bulbs to provide the same amount of light, and last up to 10 times longer.
* Generate 70 percent less heat, so they’re safer to operate and can cut energy costs associated with home cooling.
How can a florescent bulb that uses 13 watts of power make as much light as a 60 watt incandescent? One can only assume that the inefficient incandescent is taking the other 47 watts and converting them to HEAT.
Same thing goes with Metal Halide...the halide give you an intense focused light, but is also is creating more heat.
400 is 400, but lumes and heat are different.
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