Balisage Obsta
OBSTA France is specialized in the supply of very long life cold cathode Neon discharge lamps for obstruction light to the air navigation.
http://www.obsta.com/en/index.htm

Velocity of Light
Light source (macrosource) is a set of elementary sources which have different velocities in relation to inertial frame of the macrosource. Elementary light which is emitted by an elementary source has a strictly fixed speed c in relation to that elementary source in the moment of emission. Hereby follows that the macrosource is emitting lights that have different speeds in relation to its own inertial frame. Elementary light detector can only detect the light that in relation to it has speed c. Just that kind of light is detectable in the inertial frame of the elementary detector. The constancy of speed of light is only related to the detectable light and it is exclusivly the consequence of the strict detectors selectivity. Change of relative velocity between the light source and the detector can`t effect the detectors selectivity therefore the light speed that we detect in the inertial detectors frame is always the same. But every time another light is detectable depending on that relative velocity.
http://www.beotel.yu/~svetlost/

Ningbo Value FlashLight
Manufacturer and exporter of flashlight, book light, bicycle light, emergency light, head light and camping lantern.
http://www.led-flashlite.com

TMC Safety Products
Provider of airport runway and obstruction lights, barricades, and matting.
http://www.tmcsafety.com/

New Theory of Light and Introduction to Aumic Waves
A new theory on the nature of light which puts forward interesting explanations for the nature of light, electric and magnetic fields and the reason for the speed of light being constant.
http://www.geocities.com/natureoflight/

Shenzhen MengXun Electronics Co Ltd
Product range includes safety light, bicycle front light, flashing bell, automatic control light, and automatic control braking light.
http://www.wyongli.com/

Holland Aviation
Holland Aviation, The Netherlands. Manufacturer of windsocks and other aviation related products
http://www.hollandaviation.com/

Brondberg & Tandrup International
Supplier of airport equipment, security systems and obstruction and navigation lights.
http://www.bti-as.dk

Hall Productions
Hall Productions maker of custom wood light box, mail inspection light boxes, mailroom equipment, light table, light tables, wood gifts, bench, furniture and other wood products.
http://www.hallpro.com

Amateur Telescope Optics
Optical aberrations in amateur telescopes. Includes principles of physical and optical imaging with detailed review of primary aberrations. Also, aberrations in popular reflecting, refracting and catadioptric telescope objectives, telescope eyepiece and human eye.
http://www.telescope-optics.net