A lumen is a measurement of light. In simpler terms one lumen is equal to the amount of light that 1 candle will emit on 1 square foot, 1 foot away from the flame. 1 lumen = 1 foot candle

This is measure of brightness as defined by the American National Standards Institute. A brightness of 1000 ANSI lumens will project a good image in a well lit room. Higher brightness allows larger images for presentations to more people. See similar questions...

Uninstall Lumen Micro by going to your C: drive or the drive you have LM installed to. Select the folder LTI and delete it. If you have other LTI products you do not want to delete the LTI folder; delete only the Lumen Micro folder. Reinstall software using the LTI 2000 product CD. This is the update for LM 7.5 as well as the upgrade to LM 2000. Please do not install any older version of the program that you may have. See similar questions...

In the medical industry, lumen refers to the channel that makes up the inside of the tube... in a straw it is the hole in the middle. Multi-lumen tubing is just what it sounds like, a tube with multiple channels on the inside. See similar questions...

Lumens refers to the measurement of brightness at the screen. This measurement is very vague as it does not take factors like screen size, projection lens, projector settings and aperture size into account. This is the brightness measurement initially used for overhead projectors. ANSI Lumens is a standard, laid down by the American National Standards Institution, to objectively measure the brightness of the image that a projector can project. See similar questions...

These LEDs have a lumen depreciation of 20% at 100,000 hours, which is one of the best ratings for longevity and lumen depreciation. See similar questions...

If you have Windows NT or Windows 2000 as an operating system, make sure that you are logged on as Administrator. Insert the Lighting Technologies CD, and click on "Lumen Micro" in the setup screen. If the setup screen does not automatically come up, go to Start | Run, and type in "x:\setup" (replace "x" with your CD drive name). Since you are not yet licensed, it will say so. To start the 3-week trial, click "Yes". See similar questions...

MR11s and MR16s are a directional light source, and are only measured by center beam candle power, which is the average amount of luminous intensity, or how bright the light is, at the center of the beam. See similar questions...

Install LM, Photometry, and Images (extra 366 MB of hard drive space needed) -This choice enables you to access photometry and images without the CD. Install LM and Photometry (no images: extra 66 MB needed) - This choice allows you to access photometry without the CD; images may not be viewed in the luminaire database without the CD. Install LM only (no photometry or images: extra 0 MB needed) - The CD must be in the CD drive to access the luminaire database. See similar questions...

Before you delete the program from the old computer please save the site code to be submitted in an email along with the new site code. Make sure that both codes are clearly marked new and old. To access your existing site code, go to Help | About/Licensing | Licensing. Then perform the following: Delete Lumen Micro from the old computer by deleting the \LTI\Lmwin\ or \LTI\Lumen Micro\ folder from the drive Lumen Micro is installed on. Create an email with both site codes. See similar questions...

HPS gives a higher lumen per watt ratio than metal halide and the bulbs often last up to twice as long. The 600 watt HPS has the highest lumen per watt ratio of any HID bulb. But for growing MH has a higher PAR value than HPS but often isn't enough in the red range of the spectrum, this is why a mix of both is required for optimal growth. Or the use of full spectrum bulbs is replacing mixing the MH with the HPS. The bulb manufacturers are doing this for you. See similar questions...