From Avtek======== http://www.avtek2.com/halogen_lights.htm

Test environment was a dark country road, power supply holding a consent
13.8 volts and a grove of trees 1/3 mile away. Judges were six
NON-Pilots with no bias at all as to the test results.

1) 4509 barely hit the trees and no details could be observed, due to
the "Yellowish light"

2) Halogen hit the trees, and details such as green leaves and branches
were seen. However the pattern was tight.

3) H-I-D hit the trees unlike Halogen, the H-I-D light-up the all the
Trees and nests could be seen. The light was Pure White

4) Q-4509 Hit all the Trees as with H-I-D but the light went further and
beyond to houses 3/4 mile away, in a wider pattern, and a deer was seen
in the field, not seen by the other lights.

Wow, interesting. However, with two quarts bulbs going, I get the
feeling I may have them dim down in the flare as the throttles are
closed. I am again leaning toward the hid option for the nosewheel. At
the cost not being too significant I may put in the Q's just for an
experiment.

John

Thomas Borchert wrote:

4509 110,111 cp 100 watts used incandescent

Q4509 140,000 cp 100 watts used halogen

So has anybody anything to offer by way of comparison?



Go with the halogen by all means! In our Tobago, the light is much
brighter than what we had with incandescent (same bulb types you
quote). The beam is a little more narrowly focussed, though. Major
benefit is the vastly improved life-time of the halogen bulbs.