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Fluorescent Tubes Some data on commonly available fluorescent tubes. This is a bunch of raw data on the commonly available fluorescent tubes from GE, Sylvania and Philips.
Nominal CRI CCT Notes
LPW (1) appx (K)
Daylight 65 75 6250 Bluish
GE Lite White 83.8 49 4200 Pale greenish
GE Cool White 78.8 62 4150 White
GE White 80 60 3450 Pale yellowish
GE Warm white 81.3 52 3000 Yellowish
GE SP41 82 70 4100 Pale Greenish, (2)
GE SP35 82 73 3500 Pale yellowish
GE SP30 81.3 70 3000 Yellowish
GE SPX41 84.3 82 4100 White
GE SPX35 82.5 82 3500 White
GE SPX30 81.5 82 3000 White (pinkish)
GE Chroma 50 55.3 90 5000 Sunlight on cloudy day
GE Chroma 75 50 92 7500 Northern clear daylight
GE Deluxe cool white 56.3 89 4175 White (pinkish)
GE Deluxe warm white 55 77 3025 Simulates incandescent
GE Sign white 60 82 5200 White (bluish)
GE Plant light 21.3 -2 6750 Purplish
GE Plant and aquarium light 48.8 70 3050 Pale purplish
GE Natural 52.5 90 3700 Pinkish
GE SPX27 - 81 2700 Simulates incandescent
Old bulbs: lite white, cool white, warm white, sign white, plant light, white. Newer, wide spectrum bulbs: deluxe warm white, deluxe cool white, plant and aquarium light, chroma 50 & 75, sign white, natural, daylight. Newest, with REP: SP series, SPX series The older bulbs tend to have spctra that are weighted heavily around green; it's not ``spikey'' but it's a rather sharp rise and fall. There is not a whole lot of difference between cool white and warm white. The latter has a specta that peaks more in the yellow (and therefore declines slowly through red) region, whereas cool white peaks earlier in the green and declines more through green than yellow. The newer, wide spectrum bulbs have a much more even spectral output. It rises at 400 nM, peaks almost immediately, stays more or less level and slowly declines when it hits 650 nm. There are spikes, but they are at localized maxima at 400, 450, 550 and 575 nM. The REP bulbs are the newest and may have been influenced by the energy crisis. They utilize rare earth phosphours, and produce more light per given quanta of energy than other tubes. Unfortunately, the spectra is kind of wierd. It's very low and flat with two huge spikes, one in the yellow/red are about 620 nm and the other in the green at 550 nm. This is all but useless for growing plants, as these are primarily the two frequencies of light that are rejected by plants (they are green for a reason :-). Sylvania Incandescent fluorescent 39 89 2750 Simulates incandescent Sylvania Warm white 80 52 3000 Old technology Sylvania Deluxe warm white 55 74 2950 Low efficiency Sylvania Cool white 79 62 4200 Bluish Sylvania Deluxe cool white 55 89 4100 Low efficiency Sylvania Interior design 82 69 3000 Warm tone Sylvania Designer 3000 82 69 3000 More efficient than above Sylvania Octron 31K 90 75 3100 High efficiency Sylvania Designer 830 82 80 3000 Royal white Sylvania White 80 57 3450 High efficiency Sylvania Designer 3500 82 69 3500 Neutral white Sylvania Designer 835 82 80 3500 Better CRI Sylvania Octron 3500 90 75 3500 Good colour and efficiency Sylvania Natural white 53 86 3600 Good color, fair CRI Sylvania Octron 4100 90 75 4100 Good colour and efficiency Sylvania Designer 4100 82 69 4100 Low tech (non REP) Octron Sylvania Designer 841 82 80 4100 Better colour rendering Sylvania Lite white 86 48 4150 Efficient, poor CRI. Sylvania Daylight 67 76 6300 Blueish Sylvania Design 50 55 90 5000 Blueish Old tubes: cool white, white, warm white, lite white. Newer wide spectrum tubes: deluxe warm white, deluxe cool white, design 50, daylight. The rest are the newer REP types. Sylvania has a product line predominently centered around industrial and domestic lighting. (Note: Philips does not provide Lumens Per Watt information. Instead they provide a ``relative light output'' figure, which seems to be the percent of light (more or less) radiated than a cool white tube) Philips Agro-Lite Philips Cool white 100 67 4100 Cool Philips Cool white deluxe 70 89 4100 Cool Philips White 102 58 3500 Neutral Philips Warm white 102 53 3000 Warm Philips Warm white deluxe 68 79 3000 Warm Philips Daylight 83 79 6500 Cool Philips Colortone 50 70 92 5000 Cool Philips Colortone 75 64 95 7500 Cool Philips Cool green 83 70 6100 Cool Philips Natural 66 81 3400 Warm Philips Soft white 68 69 3000 Warm Philips Lite white 103 51 4100 Cool Philips Spec 30 103 70 3000 Warm Philips Spec 35 103 73 3500 Neutral Philips Spec 41 103 70 4100 Warm Philips Ultralume 27 105 82 2700 Warm Philips Ultralume 30 105 85 3000 Warm Philips Ultralume 35 105 85 3500 Neutral Philips Ultralume 41 105 85 4100 Cool Philips Ultralume 50 105 85 5000 Cool Philips Advantage X 30 117 80 3000 Warm Philips Advantage X 35 117 80 3500 Neutral Philips Advantage X 41 117 80 4100 Cool Old tubes: white, warm white, cool white. Newer wide wpectrum tubes: natural, colortone. Newer REP tubes: Ultralume, advantage, spec (?) It's hard to imagine why Ultralume 50's are so well respected. They have a horrible output spectra, flat, low, with a small peak in the violet blue range at 430 nm, a huge peak in the (useless) green range of 540 nm and another peak in the 620 nm red range. They look VERY much like a gro lux with the green thrown in for CRI correction. The Ultralume 30 is a bit better; at least the red spike is bigger than the green spike, but the real winners are the colortone 30 (``warm'', or spectra biased towards red) and the colortone 50 (``cool'' or bluish). These have very nice wide spectra. (1) Lumens per watt applies to the F40 type. (2) REP = Rare Earth Phosphours |
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