British Thermal Units (BTUs) are the measurement of heat output. One BTU is the heat that will raise the temperature of one pound of water by one degree Fahrenheit. It is approximately the amount of heat generated by burning one blue-tip kitchen match. There are approximately 3.4 BTUs per watt per hour. High bulb temperature usually does not affect the life of the lamp unless the temperature is extreme.

Don't be wowed by BTUs. The British Thermal Unit rating is an indication of the amount of heat a burner emits. Though more BTUs should generate higher temperatures, size and design also affect how hot a grill gets. We looked at cheaper models with BTU ratings as high as 45,000 that didn't grill as well as ones with lower ratings. So don't let a high number blind you to overall quality and user-friendly features. the number of BTUs increases, so does the amount of fuel that is used.

Answer: BTU stands for British Thermal Unit, a measurement that represents heat output. Typically 10,000 BTU can heat approximately 500 square feet.

LAMP is an electronic music library of classical and contemporary CDs that may be accessed across the MIT campus, including in student dormitory rooms and faculty offices. While at MIT, patrons can listen to CDs in the collection on demand, free of charge, over the MIT cable television system. We are using LAMP to research the effects of a more-accessible music library on education and music-listening behavior at MIT. More information is at http://lamp.mit.edu/.

LAMP is a joint project of the MIT Student Information Processing Board (Josh Mandel/Keith Winstein) and MIT Cable Television (Randy Winchester/Jon Ward). LAMP is generously supported by MIT iCampus (MIT/Microsoft Research) and StreetFire Sound Labs, and is supervised by Professor Hal Abelson.

A bowed lamp should be replaced immediately along with evaluation of the lamp cooling system. This condition is a direct result of improper lamp cooling. The lamp must be controlled where the surface temperature is between 600 - 800 degrees C. If the air around the lamp is not properly controlled, this temperature will rise causing the quartz tube to soften and lose its rigidity. Adjust the cooling and airflow around the lamp to reduce the temperature of the lamp body.

Discoloration can occur for several reasons. There is natural "blackening" of the quartz tube at each end during the life of the lamp. This is the result of the electrode material depositing on the inside of the tube during its use. Discoloration of the quartz will occur over time due to natural solarization or "clouding" of the quartz. This occurs as the quartz reverts to its natural crystalline structure, which is opaque to ultraviolet energy.

Customers which reside in countries that use 220v will receive a 220v power supply unless otherwise requested.

A high efficiency lamp utilizing an electric discharge through low pressure mercury vapor to produce ultra-violet (UV) energy. The UV excites phosphor materials applied as a thin layer on the inside of a glass tube which makes up the structure of the lamp. The phosphors transform the UV to visible lights.

The rule of thumb is this. Given a room with adequate insulation and typical ceilings (8 feet +/- 1 foot), each 10,000 Btu's of heat output from an efficient gas appliance will heat approximately 350 sq. ft. If the area to be heated has pitched or vaulted ceilings, poor insulation, or drastic air movement then the heating ability will be reduced. (Vented gas logs are not to be considered in this calculation as they are designed for appearance only.

If the lamp is not operating you will see a yellow brown deposit inside the lamp in addition to a bead of mercury for Gallium lamps. For iron additives you need to look very closely but metal like "filings" are visible on the inside of the lamp. You can also tell lamp type by looking at the color of the light when operational. NOTE you should never look directly or indirectly at reflected lamp light, as it is DANGEROUS.

watts is the maximum power recommended for your modeling lamp. This allows the cooling fan to maintain low internal temperatures. It is possible to use a 250-watt quartz lamp if particular care is taken. As a 250-watt bulb produces more heat, you should not operate your flash unit for extended periods of time with this bulb in place. You will need to be cautious when using this bulb, ensuring that there is adequate airflow.

These may not be our most "Frequently Asked Questions," but they ought to be, because power and energy are Frequently Confused Concepts. Power is the rate of energy release at a given instant in time-how much energy is released per unit time at that instant. Energy is power integrated- added up-over time. Power is measured in watts, kilowatts, and horsepower. Energy is measured in joules (watt-seconds) or kilowatt-hours.

A They are both measurements of heat output. To convert from Watts to BTU, simply divide by 0.293. To convert BTUs to Watts multiply by 0.293

The projector and the lamp are co-dependents. The cleaner and cooler the projector is, the longer the lamp will last. By regularly cleaning the filters (every 3 months) and ensuring the projector isn't unplugged before the cooling cycle has completed, you will have given your lamp every chance for a long, fulfilling life. The 2000-3000 lamp-life hours that ALL manufacturers publish is under lab conditions.

R" lamp is a "Reflector" lamp. Most high-hats or recessed fixtures require "R" lamps to get the most efficient lighting. The reason is simple, any light that doesn't go straight down is wasted light Reflector lamps reflect the majority of the lighting down where you want it. Although some recessed fixtures can use "A" lamps (standard light bulbs) you have to lower the wattage due to heat build up and waste energy.

You need to ask your supplier of the UV material you are trying to cure. Ask them if additional UV energy in the 390nm or 420nm range will provide any benefit.