4Sevens: sadly out of business, made decent lights in their time, really needed neutral-white LEDs and higher CRI, though.
EDIT: 4Sevens was taken over by Prometheus Lights (thanks to MascaratumB for the info
).
BLF: If it can be done on a budget, BLF will do it first. All manner of now-commonplace light options started as a BLF project. One of my 3 EDCs is a BLF-348.
Convoy: Best value for money on a budget, high quality, great customer service, lots of options available as standard, special requests may be possible, spares are available either as standard or on request. Great lights if you’re starting out as a modder, too. Historically not at the forefront of technology, but getting better. Two of my 3 EDCs are Convoy (an S2+ SST-20 95 CRI 4000K and an L4 XML2 5000K).
Fenix: Used to be a budget standard - I have family members still happily using the original-model E11s and E21s I gave them years ago. Unfortunately expensive nowadays, and not really keeping up on drivers, tints or CRI, either.
Haikelite: Decent budget lights, get the job done, but nothing stands out specially. Convoy are significantly better quality for the money.
Klarus: I don’t have any Klarus lights, and the warranty controversy is scaring me completely off. I don’t care who I buy the light from, I expect the warranty to be honoured. Do what Fenix does: the local dealer handles it if you bought the light from them, otherwise you send the light back to China. Seems fair to me.
LED Lenser: Best zooming optics in the business, behind on everything else. I get the impression that they’re just resting on their laurels by way of their optics. I have a couple of LED Lensers from over 10 years ago, and I’m occasionally tempted to try a newer model, but without high CRI options and better drivers, I never get to the point of clicking “buy”.
Nightwatch: I have an NS22 Seeker with 4000K 95 CRI SST-20, and it’s a nice light. A new brand, but one to watch.
Nitecore: I only have one Nitecore, an MT06MD. Very nice light, reliable and good quality. Probably my most-used light around the house, also handy when doing electronic projects. Ludicrously expensive now, though - the price has more than doubled since I got mine.
Rofis: Decent quality, mid price, get the job done. Notable for their multi-angle heads that can rotate from 0° to 90°. Mine are mothballed now, though, for lack of CRI at lower output levels and lack of high output / long throw.
Sofirn: A good budget light maker, known for their willingness to work with BLF on all manner of interesting projects. They have AA / 2×AA options that Convoy don’t, which is good for people who don’t want Li-Ion cells, but Convoy tend to win me over with the range of LED options they can supply.
Solarforce: Some people love these, but I’ve had a lot of trouble with supposedly interchangeable parts not fitting. No more Solarforce for me. Convoy are far, far better at consistently manufacturing parts that fit.
Sunwayman: Used to be a great mid-range manufacturer, my V10A & V20As are lovely lights with their continuously-variable magnetic control rings. If only there’d been a high CRI option (I really must get around to reflowing a high CRI LED into one). Sunwayman seem to have dropped their magnetic control rings now, though, despite that being their unique skill. Not really on the map for me these days.
Toykeeper:
OK, not a brand as such, but deserves her place as the creator of such an amazing choice of firmware and UI options. I don’t even try to count my Biscotti lights anymore
but one of them is my EDC Convoy S2+ SST-20 95 CRI 4000K.