Introduction

I wanted to specify a Convoy S2+ Red with an XML2 T4-7A to produce roughly the same lumens in each mode as a T6-3B 7135*3 version I already had. Whilst crunching my way through the Cree Product Characterization Tool, it occurred to me that other people here might find a set of comparison tables and tint images useful. You'll find the tables at the end of this post, after the examples. The images are in post 7.

I consider the Convoy S2+ to be a very nice light. If you'd like to know more,Chicken Drumstickhas reviewed the T6-3B 7135*8 version here, andmaukkahas posted a comprehensive instrumental analysis of his T6-3B 7135*8 sample here, including spectrophotometric data and graphs. You can also find a description of how my T4-7A 7135*4 sample behaves when the cell runs low in post 26.

Applicability

You use the information in this post at your own risk. I have only used it in conjunction with the Convoy S2+ Red.Warning:

However, it should apply in full to the following Convoy lights: S2 Grey; S2+ Black; S2+ Grey; S2+ Red; S2+ Blue; S2+ Green; S3 Black; S3 Grey; S4 Black; S5 Black; S6 Black; and S8 Black.

In addition, some of it should apply to: BD01 Black (7135*8 driver only); BD02 Black (7135*6 driver only); BD03 Black (7135*4 driver only); C8 Black (7135*8 driver only); C8 Grey (7135*8 driver only); M1 Black (7135*6 or 7135*8 drivers only); M2 Black (7135*6 or 7135*8 drivers only); and S2+ Grey 18350/16340 version (7135*3 or 7135*4 drivers only, see also post 13).

Option Availability

Most intermediary dealers only sell a small subset of the possible combinations of Convoy options.

The easiest way to be sure that you have access to the full range of Convoy lights and accessories, including all of the customisation options, is to buy from the original manufacturer's AliExpress store.

Search Google for "shenzhen convoy electronics" and it should be the first link; double-check for the store number in the link, which should be 330416.

You can find my thoughts on some of the Convoy accessories in post 12.Update:

Convoy LED Tints

You can find comparison photos of the different tints lighting a garden environment by looking up the Convoy S2+ Red page on the original manufacturer's AliExpress store (see previous section). The tint photos are near the bottom of that page.

LED Colour Temperature Description XML2 U2-1A 6500-7000K Cool White XML2 T6-3B 5000-5200K Neutral White XML2 T6-4C 4300-4500K Neutral-Warm White XML2 T5-5B 4000-4200K Warm White XML2 T4-7A 3000-3200K Very Warm White

I have added a set of tint comparison photos to post 7.Update:

Examples

I wanted a couple of Convoy S2+ Reds to act as backup lights to my two Fenix UC35s, so I wanted their medium modes to have lumen outputs broadly corresponding to the UC35's 180lm medium mode. I also decided to get neutral white LEDs, just because I could (the UC35 is cool white).

I later needed a desk lamp in a place where it was awkward to run a mains cable, so I pulled out one of my new neutral white S2+ Reds and mounted it with a Rofis AR01 mount.Example 1:Check the Mid / Medium Mode / 40% table, run along the T6-3B row, closest match is 160 lm in the 7135*3 driver column. Check the Hi / High Mode / 100% table; that combination gives 370 lm. Check the Lo / Low Mode / 5% table; that combination gives 21 lm.

The end result:

Convoy S2+ Red

XML2 T6-3B LED

7135*3 driver21 lm ----- 160 lm 370 lm ----- Fenix UC35 15 lm 50 lm 180 lm 480 lm 960 lm

The 160lm mode was the perfect brightness, but the neutral white tint clashed with the much warmer-tinted room lighting. I also tried the UC35 to confirm that it was the tint that was bothering me, and yes, the UC35 was even more of a clash.

OK, I thought, I'll buy another S2+ Red, but in a very warm white with the medium mode again at about 180lm. Checking the box for the room light - an 18W Philips Master LED bulb - yielded a colour temperature of 2700K. The closest Convoy LED option is the XML2 T4-7A at 3000-3200K.

My new very warm white S2+ Red works wonderfully as a battery-operated desk lampExample 2:Check the Mid / Medium Mode / 40% table, run along the XML2 T4-7A row, and there's a perfect match at 180 lm in the 7135*4 driver column. Check the Hi / High Mode / 100% table; that combination gives 400 lm. Check the Lo / Low Mode / 5% table; that combination gives 23 lm.

The end result:

Convoy S2+ Red

XML2 T4-7A LED

7135*4 driver23 lm ----- 180 lm 400 lm ----- Convoy S2+ Red

XML2 T6-3B LED

7135*3 driver21 lm ----- 160 lm 370 lm ----- Fenix UC35 15 lm 50 lm 180 lm 480 lm 960 lm

Comparison Tables

It looks like Convoy specs use LED lumens, so I've discounted the LED lumen figures from Cree by an arbitrary 20% for optical losses and rounded the numbers to 2 significant figures. Cree LED lumens are in normal type, my discounted & rounded lumens are in italics.

Whilst using the Characterization Tool, I left the LED junction temperature at the default 25°C. Where driver currents fall awkwardly between current steps in the Characterization Tool, I have estimated an interpolated number to 2 significant figures.

Hi / High Mode / 100%

DriverLED Bin7135*3

1050mA / 1050mA7135*4

1400mA / 1400mA7135*6

2100mA / 2100mA7135*8

2800mA / 2800mAXML2 U2-1A

6500-7000K489.4 lm

390 lm623.8 lm

500 lm860.6 lm

690 lm1067.3 lm

850 lmXML2 T6-3B

5000-5200K456.8 lm

370 lm582.3 lm

470 lm803.2 lm

640 lm996.1 lm

800 lmXML2 T6-4C

4300-4500K456.8 lm

370 lm582.3 lm

470 lm803.2 lm

640 lm996.1 lm

800 lmXML2 T5-5B

4000-4200K424.1 lm

340 lm540.7 lm

430 lm745.9 lm

600 lm925 lm

740 lmXML2 T4-7A

3000-3200K391.5 lm

310 lm499.1 lm

400 lm688.5 lm

550 lm853.8 lm

680 lm

Mid / Medium Mode / 40%

DriverLED Bin7135*3

420mA / 1050mA7135*4

560mA / 1400mA7135*6

840mA / 2100mA7135*8

1120mA / 2800mAXML2 U2-1A

6500-7000K212.7 lm

170 lm278.4 lm

220 lm~400 lm

320 lm~520 lm

420 lmXML2 T6-3B

5000-5200K198.5 lm

160 lm259.9 lm

210 lm~380 lm

300 lm~490 lm

390 lmXML2 T6-4C

4300-4500K198.5 lm

160 lm259.9 lm

210 lm~380 lm

300 lm~490 lm

390 lmXML2 T5-5B

4000-4200K184.3 lm

150 lm241.3 lm

190 lm~350 lm

280 lm~450 lm

360 lmXML2 T4-7A

3000-3200K170.1 lm

140 lm222.8 lm

180 lm~320 lm

260 lm~420 lm

340 lm

Lo / Low Mode / 5%

Unfortunately, the Characterization Tool doesn't go this low, so these are all estimated to 2 significant figures by dividing the lumen figures for higher currents. Given that LEDs are more efficient at lower currents, these estimates are likely to be slightly too low; as a ballpark indication, by up to 5%.

DriverLED Bin7135*3

52.5mA / 1050mA7135*4

70mA / 1400mA7135*6

105mA / 2100mA7135*8

140mA / 2800mAXML2 U2-1A

6500-7000K~28 lm

22 lm~36 lm

29 lm~55 lm

44 lm~72 lm

58 lmXML2 T6-3B

5000-5200K~26 lm

21 lm~34 lm

27 lm~51 lm

41 lm~67 lm

54 lmXML2 T6-4C

4300-4500K~26 lm

21 lm~34 lm

27 lm~51 lm

41 lm~67 lm

54 lmXML2 T5-5B

4000-4200K~24 lm

19 lm~31 lm

25 lm~47 lm

38 lm~63 lm

50 lmXML2 T4-7A

3000-3200K~22 lm

18 lm~29 lm

23 lm~44 lm

35 lm~58 lm

46 lm

Finally, you can get custom mode groups that include Mid / Medium Mode / 30% or Lo / Low Mode / 10% levels, so here are a couple of tables for those.

Mid / Medium Mode / 30%

DriverLED Bin7135*3

315mA / 1050mA7135*4

420mA / 1400mA7135*6

630mA / 2100mA7135*8

840mA / 2800mAXML2 U2-1A

6500-7000K~160 lm

130 lm212.7 lm

170 lm310.4 lm

250 lm~400 lm

320 lmXML2 T6-3B

5000-5200K~150 lm

120 lm198.5 lm

160 lm289.7 lm

230 lm~380 lm

300 lmXML2 T6-4C

4300-4500K~150 lm

120 lm198.5 lm

160 lm289.7 lm

230 lm~380 lm

300 lmXML2 T5-5B

4000-4200K~140 lm

110 lm184.3 lm

150 lm269 lm

220 lm~350 lm

280 lmXML2 T4-7A

3000-3200K~130 lm

100 lm170.1 lm

140 lm248.3 lm

200 lm~320 lm

260 lm

Lo / Low Mode / 10%

Unfortunately, the Characterization Tool doesn't cover the lower currents, so those are estimated to 2 significant figures by dividing the lumen figures for higher currents. Given that LEDs are more efficient at lower currents, these estimates are likely to be slightly too low; as a ballpark indication, by up to 5%.

DriverLED Bin7135*3

105mA / 1050mA7135*4

140mA / 1400mA7135*6

210mA / 2100mA7135*8

280mA / 2800mAXML2 U2-1A

6500-7000K~55 lm

44 lm~72 lm

58 lm109 lm

87 lm144.2 lm

115 lmXML2 T6-3B

5000-5200K~51 lm

41 lm~67 lm

54 lm101.7 lm

81 lm134.6 lm

108 lmXML2 T6-4C

4300-4500K~51 lm

41 lm~67 lm

54 lm101.7 lm

81 lm134.6 lm

108 lmXML2 T5-5B

4000-4200K~47 lm

38 lm~63 lm

50 lm94.4 lm

76 lm125 lm

100 lmXML2 T4-7A

3000-3200K~44 lm

35 lm~58 lm

46 lm87.2 lm

70 lm115.4 lm

92 lm

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