You can’t go by that. That was written before TA had any calibrated source for his Lumen Tube and it was reading about 30–40 too high. I can’t remember the exact number.
You also have to factor in that he’s measuring a raw led with no reflector or lens. If you put that same led in a flashlight, the output goes down based on how efficient the reflector and lens is.
Sorry for the newbie question, but should I leave unprotected cells in my lights when they are not in use? Is there a safety concern? Again, apologies for the naive question.
It depends on the specific light. Some lights have very low parasitic drain and some don’t. If you aren’t going to be using a light for at least a few days then it’s best to mechanically lock it out. The SP70 has the tail switch to cut power. Some lights with anodized threads allow you to turn the tail cap half a turn to cut power. Lights with raw threads might require taking the battery out.
Some lights may take a couple of years to drain the batteries while other lights may only take a couple of weeks.
I lock out most of my lights mechanically. The ones I don’t are used pretty often and have very low drain. They also use protected cells.
All my lights using unprotected cells get locked out.
My SP70 (kit version) has arrived 2 days ago. I’m very satisfied with it. I didn’t find any imperfections on the body/anodization nor in the reflector. It seems Sofirn made big progress in dust-free assembly. Those 26650 cells included in the kit version (from Amazon DE) seem to be their standard 26650s with 5.500mAh and without “High Drain” label.
There is nothing wrong with the SP70 Kit. In fact, it checks all the marks for me. Tail switch w/momentary, check. Super bright, check. Good batteries, check. Wide hot spot, check. Weighty for thug beatings, check. Tint, it has one, check. All kidding aside, I am anxious for the BLF version because it is sure to kick ass. I’m just wondering what the consensus will be on the specs and how we will resolve the range of priorities. AR glass, fancy springs, perfect button alignment, etc.