LB Photometer is used to compare the intensities of two light sources. This is achieved by using a combination of specially made prisms knows as Lummer Brodhum Cube. LB Photometer consists of a box that is made totally dark from inside and the prism cube is fitted inside this box along with right angled prisms in a very symmetrical. Light entering from the openings of the box strike the right angled prisms and passes through a right angle and falls on the prism cube. Our LB Photometer is best in its class and precisely developed. We use custom made right angled glass prisms whose opposite sides are made convex by grinding and then pressing against each other in a special brass enclosure known as the Brodhum Cube. With precise, carefull machining and proper design, our LB Photometer is totally capable of performing the Light Intensity experiments very accurately. L.B Photometer assembly includes one Lummar Brodhum Photometer & two light sources