Hi friends. I wish to write today on selecting a good light source. Basically there two kinds of it Halogen Xenon A. Halogen: This is cheaper compared to Xenon. It gives a yellow light. Some manufacturers also make a white light Halogen light source. Advantage: Cheaper The bulp lasts long Bulb change is cheaper too. Disadvange: The main disadvantage of halogen light source is that, in case of bleeding, red color of blood absorbs light and thus visibility due to decreased light to a great extent. For this particular reason, it can be used for basic laparoscopic procedure only. B. Xenon: This Light source gives white light. Advantage: Gives almost natural vision. Must for advanced surgical procedures. . Disadvantages Apart from initial Costs, bulb is costly too. The life of bulp is shorter compared to halogen bulbs