does it measures led light? does it comes with a calibration certificate? low long the certificate lasts?
288495
yes you can measure LED light, mine did not come with a certificate but you can send it in to Extech for a NIST calibration or you buy it calibrated (HD450-NIST)
288496
Eduardo, yes it measures LED light. No, it does not come with a calibration certificate.
940387
yeah it was not hard to use. I wish it measured a little lower light levels but that makes it cost more, it depends on how low of light you need to check.
1987146
I used a standard motion/light detector with two of these and it works fine. Not sure that only 1 10W light will work as there is a minimum turn on requirements. You need to look at the minimum load turn on specification. The alternative is to buy this light, but already has the light/motion sensor built in. They are just a few dollars more. These do not create bright white light, like for reading. Also make sure the wire length is long enough for your application. I got fooled and some wires were only 6" long on some lights I bought.
331818
I have one and I'm pretty sure it is just a light sensor. without messing around with the electronics it only lights up if it is dark.
1758394
Is use for a led light that when go off is time to replace the filter.I personally not use it,I buy a P.H. tester and ppm tester and do checks for time to time.
118871
It is LED light, should last long time. Had it a year and no issues. Not sure about replacement.
1497077
I have one and the light meter worked for about a month after i got it. The light mustve died or something im not sure but i know its not the batteries.
1389853
I don't have a meter to measure the brightness/lumens but it is effective as a night light on DIM and very effective for lighting an area when the motion detector switches it briefly to BRIGHT illumnating a ~10+ foot radius area near the light. The LED panel has four bright elements that also diffuse through the white panel surface to give a very bright rectangular illuminator - more effective than four pin-point LEDs.
1584043
yes it comes with the LED display in the box. I thought mine didn't so I bought another now I have 2.
556568
I would have no problem with this meter doing that. I use it all the time to check lighting ratios. Just hold down the trigger and read away. You'll have to do the math old school but it'll work.
1860315
I can't explain how to measure the light and how it works in this small place, you can google it. The value reading on this measure is LUX, you don't need to use any conversions, you can read Lux value directly on the screen, but I have to tell you that the value is not accurate compare to the good one. Mine have problem after 1st week using it.
499949
No it measures surface temperatures. It's a laser, so it only travels as far as the light will allow it.
1770795
Hello, I've had mine for a little over a year and feel it's a good tool for the household electrical measurements. I started out measuring my fridge, washer & dryer, computers etc;. My main concern was the lighting in the house. At about 6 months I was getting a pretty good idea that this was a valuable tool for me. It was this tool that convinced me to change the way we do laundry with how much clothing to wash and dry at on time. Also changed to LED's for lighting. The Belkin wised me up to the coffee maker using power when not in use. At about 12 months I realized a 41% decrease in my electric bill. Accurate, I think so. Especially when your on a fixed income like me. I hope this helps you. Thank you. Dave
988987
This is ere I am using it. LED light is NOT supposed to attract bugs and has MUCH lower power consumption. Hope this helps!
1066929
I'm not sure if it is an 'official' certificate of calibration, but there is a sticker on the cord that tells when the calibration is good to. Call or e-mail the seller or manufacturer?
1792682
No. It uses batteries. LEDs use very little juice therefore the batteries last a long time before changing.
394847
Watts are not used to measure LED lights since they are low wattage. Check out forums on led lighting to see how many lumens you need to have for your tank. These lights work good for low light plants in my 10g tank