Kaiser proVision

So you can compare them with LED lamps, we also tested the lights that we use in our photography studio.  We use them every time we test a digital camera or a camcorder.

Remember that these aren't LED lamps, but two separate sets of fluorescent tubes.  For this test, we had them on either side of our camera, and set them to 60% of their maxiumum power.

Lighting

This is our photo lab which has a black wall and the light intensity measured in lux in different areas.  The bulb is 1.86 m back from the wall.  Be careful when you compare these results to the our other lamp reviews, because here we've used two powerful light sources, instead of one central unit. 



This sort of light is supposed to resemble natural daylight, and the manufacturer reports a colour temperature of 5500 K, which is what the sun produces at midday.  That's similar to the colour temperature produced by the Viva-Lite bulbs.

Energy Consumption

Using both of the fluorescent tubes at 60% of their total capacity, we measured an energy consumption of 86 W overall.

Spectrum

Here's the colour spectrum produced by the proVision lamp.  It picks up where entry-level compact fluorescent bulbs leave off, making big improvements over blue, cyan and green.  We produced these spectra using an i1 Pro sensor from X-Rite.


The ideal colour spectrum should be even, with even intensity across all of the colours in the spectrum without any peaks and troughs. That isn't the case here.  At least there are no gaps, and covers the whole spectrum, even if the yellow and the far end of the visible red light are at very low power.  For more information on the benefits of a wider, more even spectrum, read our review of the Viva-Lite bulb.

Here are our technical measurements for this lamp.  The closer the CRI (colour rendering index) and the FSCI (full spectrum colour index) are to 100, the better; the colour temperature is a matter of personal taste and depends on the type of light you're looking for.  There are no good or bad values for this figure.  We have more information about these measurements in this news piece.

• CRI: 91.3
• FSCI: 71.39
• Colour Temperature: 5471 K