I own all 3 sizes of these MVP UV-lamps and  have mixed feelings about these in general. These work great, but seem to not withstand any sort of dropping or impacts. Seems like these are some generic lamps only branded MVP. This large version has the best size vs. performance-ratio. Doesn't take up very much space and charges glow-discs nicely enough even during cold temperatures (below 0 Celsius).  The first large one i have has had to be stitch up a fair amount of times already after dropping it. This is the second. Disassembling the lamp shows that these aren't made durable and need to be used accordingly. I would recommend to go for the XL-version though as the physical size is the only difference as weight difference is negligible, and it can also used to locating lost discs +  the charging time is greatly reduced.