NCIDQ IDFX Practice Exam

When considering the disadvantages of tungsten halogen lamps, one notable concern is that they operate at very high temperatures. This characteristic can lead to risks associated with the glass envelope of the lamp becoming heated to a point where it might shatter, potentially causing explosive shattering. This risk is particularly pertinent when the lamps are improperly handled or placed near flammable materials, as the heat generated can easily exceed safe levels. While the other options could hint at drawbacks of tungsten halogen lamps, they do not adequately capture the specific hazards related to their high operating temperatures. These lamps indeed have shorter lifespans compared to traditional incandescent lamps, they do generate substantial heat, raising safety concerns, and they can be larger in size, but the primary issue centers on the potential for dangerous situations arising from their heat generating abilities. Additionally, many tungsten halogen lamps can be dimmed, making the claim regarding dimmability less relevant. Thus, the emphasis on high temperatures and the associated risk of explosive shattering is particularly significant.