Bright white fluorescent lamp is only .85"L x .78"H (excluding glass seal tip) x .18" thick. This lights up a nice bright white when connected to a high voltage. Its original use was for backlighting a small LCD display and it probably was a very costly item. Lamp has peel off backing to expose 2 adhesive pads on back for "press on" mounting, however this should be used in conjunction with the terminals to hold lamp in place. New-prime.