The ornamental design for lens holder for magnifying glass with lamp, as shown and described.
1. Lens holder for magnifying glass with lamp
1.1 : Perspective
1.2 : Front
1.3 : Left
1.4 : Right
1.5 : Back
1.6 : Top
1.7 : Bottom
1.8 : Bottom
1.9 : Perspective
The gray coloring is used to depict transparency and forms NO part of the claimed design. The dashed lines in the drawings depict portions of the lens holder that forms NO part of the claimed design.