Choosing bulb replacements for perfect lighting in my studio.
Since I have fluorescent fixtures already installed in my painting studio and didn’t want to replace them it narrowed down the search for the type of bulbs i would be looking for. Learning about LED or halogen lighting options, which I might consider if I was designing an entirely new studio, was off my research list. The installed fixtures are 4’ and had a mixture of cool and warm T8 bulbs bought at the local big box store.
The existing lighting fixtures in my painting studio hold a series of florescent 48″ T8 bulbs.
As soon as I began researching online for the best bulbs for studio lighting I knew the options were very broad and would need more studying. I would need to know what the important specifications would be in selecting the right ambient lighting for working on my paintings and also for proofing digital prints?
In my online searching I stumbled upon a wonderful article by Will Kemp, an Artist & educator from England. He gave some historic references & then went on to explain the technical aspects of lighting.
I learned about the ratings of Kelvin, CRI and Lumens:
K or Kelvin. The color temperature index of cool light at 5500K and a bit warmer light at 4100K seemed to be my goal. I didn’t want to go too cool while creating the Art since most of my work is hung in either residential or corporate lighting environments. Residential incandescent bulbs are in the 2,500K to 3000K range
CRI or color rendering index. I sounded professional when I went to my specialty lighting store and pronounced it correctly, Cree rather than C.R.I. CRI is a measurement of how the lighting reveals colors across the full spectrum when measured against natural daylight. The highest measure is 100 and a good CRI for a painting studio is 85 and up.
Lumens are the measurement of how much light is coming from a bulb. The more lumens the the brighter the light. This differs from wattage which is a measurement of how much energy is used to create the light.
Over the years, as bulbs have burned out in my painting studio fixtures I went to the big box store & bought a warm and a cool fluorescent for each fixture fully well knowing that a more appropriate solution should be available. Recognizing that over the years my lighting had become inconsistent, I decided to bite the bullet & finally do it right.
I was spurred on to optimize my own painting studio by the announcement that the Metropolitan Museum of Art in New York, which I visit regularly to study their paintings, is completely renovating their gallery lighting over the next few years. You can follow the Met’s lighting project here.
I studied the elements of lighting & then went the specialty lighting store that most of the contractors in my area frequent. Initially the gentleman at the counter said that all I needed was an ordinary fluorescent bulb which I could buy at any box store. Once I began to speak about the technical aspects of the bulbs I was considering, he became interested & spoke with me at length about the options for my studio. We discussed the temperature of the current lighting and the problems I would have if I went to a higher K or color temperature.
So what did I choose?
I chose a bulb with a Kelvin of 4100K rather than 5500K which is often called a daylight bulb. As mentioned earlier, I was considering the rooms in which my paintings are usually displayed after they are purchased. I should also mention that I have a large 10’ north facing window in my painting studio which offers a good deal of natural light.
I also selected a higher than usual CRI number of 85 to give me a more robust range of colors which displays the full complexity of my subtle pigments. Lower CRI’s don’t always show the full spectrum of yellows.
For the lumens my choice was to select 3250 which was brighter than many of the bulbs they were replacing although the wattage remained the same at 32W.
One consideration that I was nervous about was the thickness of the actual bulb. The existing T8 bulbs were thicker than the ones I took home from the lighting store. My consultant assured me that they would be fine in my fixtures and he was right. Less glass didn’t mean less light.
The price for each bulb was a modest $2.40. Well worth the investement!
The lighting is perfect! Great color balance, brightness, range. It was worth the time I took to do the research. As an Artist, I research my subjects, paints, pigments, mediums, brushes, canvas, etc., etc., etc… So now I can add studio lighting to the list of professional choices I’ve made towards producing excellent Art.
This is the choice of replacement T8 florescent lighting bulbs for the correct balanced lighting in my studio. I didn’t pick by brand name but by specifications.
