Abstract: A method of measuring the efficiency of an LED (10) includes illuminating the LED with light and measuring a response of the LED (10) to the absorption of light in order to measure the quantum efficiency of the LED (10). The spectrum of the light at least partially overlaps the absorption spectrum of the LED. An LED assembly (40) includes first (42) and second (44) LEDs, and a driver (43). An absorption spectrum of the first LED at least partially overlaps an emission spectrum of the second LED. The driver includes a monitor(45) for monitoring a response of the first LED to the absorption of light emitted by the second LED; a current supply (47) for supplying current to the first LED;and a switch (49) for switching between (a) operating the first LED in an absorbing mode and the second LED in an emitting mode, and (b) operating the first LED in an emitting mode.

Abstract: An LED assembly (50) includes a plurality of LEDs including a first LED (52, 56, 60) of a first colour and a second LED (54, 58, 62) of a second colour. The assembly also includes a driver (53). The driver (53) includes a monitor (55) for monitoring a response of an LED, the absorption spectrum of which at least partially overlaps the emission spectrum of the first LED, and thereby obtaining an indication of the light output of the first LED. The assembly also includes a current supply (57). The driver (53) is configured to control the current supply to supply current to at least one LED of the plurality of LEDs in dependence upon the indication of the light output of the first LED whereby to maintain a desired colour mix of output light from the LED assembly (50).

Abstract: An integrated high brightness electrodeless lamp includes a lamp base defining two or more compartments housing components of the lamp, wherein at least one compartment provides an opening in the lamp base, a cover fitted to the lamp base, and an optics assembly positioned in the opening in the lamp base, wherein the lamp base, the cover, and the optics assembly provide an RF sealed system. The lamp components include an RF source providing RF energy for the lamp, an aperture bulb assembly including an electrodeless envelope containing a discharge forming fill which emits light when excited by RF energy, and an excitation structure for coupling RF energy from the RF source to the discharge forming fill. The optics assembly may be mounted in the opening in the lamp base with a twist lock mounting structure.

Abstract: An incubator having a mattress tray that underlies and supports an infant. The mattress tray is movable from a first position where it is entirely within the controlled atmosphere of the infant compartment to a second position outside that infant compartment and when moved to the second position, a warm flow of air is provided to warm the infant . The outside position of the mattress thereby allows considerable access to the infant to carry out procedures by attending personnel that would not be possible within the confined infant compartment and yet the invent is warmed by the flow of warm air.

Abstract: An infant care apparatus that has a infant bed tilt mechanism that can be accessed by the user in close proximity to the infant mattress and at the mattress level. When the infant care apparatus is an infant incubator, the tilt mechanism is operable internal of the infant compartment. The user can thus be carrying out some procedure on the infant within that infant compartment of the incubator or at the level of the infant bed of an infant warmer and be able to alter the tilt angle of the infant bed without breaking the semi sterile conditions surrounding the infant and its close proximity by manipulation of a actuating mechanism that is situated at the level of the infant bed and in close proximity to the infant. The tilt mechanism itself has a lead screw rotatable mounted to the infant bed and which passes through a threaded nut that is resiliently affixed to the base of the incubator or infant warmer.

Abstract: A hot melt adhesive dispensing apparatus comprises a housing including a supply chamber for receiving and holding a solid adhesive, an electrically powered heater, and a spray nozzle assembly. A pneumatically actuated plunger pushes solid adhesive towards the melt chamber wherein the solid adhesive is progressively melted for passage into the spray nozzle assembly which includes a plurality of air jets which impinge upon the stream of melted adhesive exiting a nozzle to create an adhesive spray.