5 lights to keep!? You're making this easy!
1 - Fenix TK76.
For one, it is massive, which already makes it score some points. Second, it got 12x ("dodeca", if we're getting fancy) 18650's, so the runtime is measured in days, not hours. Third, it got 3 different LED's, with 3 different optics, so it does everything - full flood, semi-flood, and spot - either separately or all at once. And four, when I'm tired of lugging it around...it got a tripod mount. "Only" 2800 Lumen, but that is more than enough to serve 90 % of any need for a flashlight. I would go with this monster even if I could only choose a single light to keep.
2 - Fenix LR35R
As a work light, my favourite has until now been the 2014, 960 Lumen Fenix PD35, but now I would say the Fenix LR35R. Dual 21700, 10000 Lumen. Recent aquisition, but the output power to size ratio is excellent. Hasn't passed any real-life trials yet (which the PD35 has), but I accidentally dropped it once (1,5 meters onto dirt ground), and it didn't seem to care at all. Bought one, tested it, then I bought another. Waiting for my paycheck to buy a third.
3 - Fireflies PL47U.
Another recent addition. Single 21700, 2200 Lumen mule. It's so floody, it only offers about 5 meters of illumination, but the "E21A mix 3800K" tint and colour rendition is absolutely gorgeous (chips are supposedly CRI 98). And being a mule, it is perfect for close-up detail work.
4 - Fenix HP30R v2
Headlamp, because - duh, duuuuh - everyone should have one! Another dual 21700 light, 3000 Lumen. It's very well balanced, so having it on the head for extended periods of time is no problem. It functions as a power bank, and it supports power passthrough (!!!). So you can hook up an external battery bank to either charge the batteries, or remove the batteries entirely and run the light directly off external power (though this will lock out the 2 highest output modes). I purchased a 30.000 mAh power bank to keep in my pocket for long hikes (should I ever do one). Or more likely (to be honest, equally less likely these days) visit the desolate family cabin.
5 - Emisar Noctigon K9.3
Single 21700, 2150 Lumen. I specified it as the perfect late-night walk light. 9x Nichia E21A hCRI 3500K LEDs + 3x Osram W1 Green LEDs to preserve night vision (personally, I prefer green over red illumination for this). It's reasonably well balanced, and it's surprisingly compact. I like the design of the light very much, and because of the thicker head it fits perfectly in the tool hook on my EDC pants. AND it has RGB auxiliary lights for bling, when the light is not being used.
Honourable mentions:
- Sofirn SF16 UV
- Emisar D4K Copper
- Jetbeam EC-R16
- Coast PM310R
- Nitecore Tip