Artificial sky for immediate daylight measurements
Lobelia is an easy relocatable mirror box artificial sky. It is powered by dimmable LED lamps for zero maintenance, high quality of the light (uniformity in space and time) and low cost of ownership.
Lobelia is an affordable tool for teaching and design the daylighting. It is able to reproduce the overcast sky (a.k.a. Spencer and Moon sky) really well, thus making the measurement of daylight factors in your scale models easy and fast.
Lobelia sky can be an objective tools to evaluate the daylighting performance of different geometries and/or materials of your projects thru the use of the metric of daylight factor (DF). The daylight factor is defined as the ratio of the light level inside to the light level outside.
The best environment to take photos and videos of your models. Your models will be appreciated at their best under an illumination of 8000lx with a Color Rendering Index (CRI) greater than 90 and a Color Corrected Temperature (CCT) of 5000K.
High uniformity of brightness and reduced power consumption is achieved with custom LEDs backlighting coupled with ad-hoc suspension system. The heating generated from the device is comparable to that of a PC.
The powder coated steel frame is joined with bolts and can be easily moved thanks to the castors. Custom designed mechanical joints allow the regulation of the geometry of the device.
The door and wall panels are custom made sandwich panels. The sandwich composition guarantees the security, durability and quality (planarity) of the mirror box.
The, optional, lux meter heads can be placed inside and on the top of the model to obtain an immediate measurement of the daylight factor. The sensors are optimized for models of scale 1:50.
The wired remote controller is used to adjust the light level from the luminous ceiling (0-100%). The same remote controller can be supplied with a datalogger to be connected to the lux meters for the measurement and visualization of the Daylight Factors and/or the lux levels.
The remote controller holder can be used for easy transportation. Each luxmeter sensor is supplied with a holder that is also the cap for the luxmeter and protect it from the aging.
The mirror employed is thin (5mm) back plated glass mirror. The crystal clear type of glass reduces the color aberration (greenish effect). The glass has very low VOC and formaldehyde emission for greater comfort inside the mirror box. The mirror are plated with HIPS black sheet for safety and quality. The mechanical support system allows the orientation of the panels.