The phrase "handheld lamp" is correct and can be used in written English.
You can use it to refer to a lamp that is designed to be carried or held in your hand. For example, "The flashlight on his belt had no batteries, so he used his handheld lamp to navigate the cave."
Week 6: The students continued to design and re-design their solar powered cars, and tested their cars' movement with handheld lamps.
UV shadowing was accomplished using a handheld UV lamp and standard digital imaging device.
The fluorescent visualisation of the whole rat brain was achieved using a simple low power handheld UV lamp [58].
This being the case, most smartphone-based fluorescent assays incorporate external light sources, the most popular being a handheld UV lamp or separate LED [52, 59, 60].
In addition, we have also demonstrated its feasibility for oxidase-based visual biosensing, in which only a handheld UV lamp is used.
In the presence of DPA, the paper-based visual sensor, illuminated by a handheld UV lamp, would result in an obvious fluorescence color change from green to red, which can be easily observed with naked eyes.
More significantly, a paper-based visual sensor for DPA has been devised by using filter paper embedded with Tb/DPA@SiO2-Eu/GMP, and we have proved its utility for fluorescent detection of DPA, in which only a handheld UV lamp is used.
After 30 mins exposure from a handheld UV lamp (short wave, 254 nm) at a distance of 10 cm away from samples, the proteins were separated on SDS-PAGE, stained with Coomassie, and subjected to fluorography.
Interestingly, this was accomplished despite the fact that the analysis was conducted using ethidium bromide detection and a Perkin Elmer 9600 thermal cycler retrofitted with a handheld UV lamp.
