leptraps
Banned
Enter your message here...
Posts: 2,397
|
Post by leptraps on Mar 7, 2015 4:43:59 GMT -8
Fluorescent bulbs are designed differently than HID (MV bulds are HID, High Intensity Discharge). Fluorescent bulb use the internal coating to create the light. Different coatings create different light, however all of the coatings are phosphorus based.
Some HID bulbs have a internal white phosphorus coating that blocks the UV from being emitted. Always use CLEAR non coated MV/HID bulbs when collecting insect. You WILL get more insects with clear bulbs.
When MV bulbs were first introduced (1950ish or so), they basically were used for out door lighting. In the 1970's it was learned that the UV light was not good. When they began using them indoors, the coating was added.
I would be very careful about drilling holes in any HID bulb. Sometimes the big bang theory is real....Also some Mercury.
|
|
|
|
Post by compsulyx on Mar 7, 2015 23:51:56 GMT -8
Thanks for additionnal information. Yes I totally agree, making holes in HID bulbs is not the best option.... MV bulbs, clear ones, are not easy to find on marcket for a 220-230volts use, and they are very expensive. Are they produced especially for scientific purpose ... Thanks Thierrt
|
|
|
Post by mikelock34 on Mar 8, 2015 2:06:45 GMT -8
"Some HID bulbs have a internal white phosphorus coating that blocks the UV from being emitted. Always use CLEAR non coated MV/HID bulbs when collecting insect. You WILL get more insects with clear bulbs."
Leroy,
I still have to argue a bit with the above statement. As I have mentioned previously, my coated 1000W MV bulbs outperform other lights including uncoated 1000W MV lights in the area when I have been collecting both in the jungle and at home. Do not know why, just works out that way.
Best,
Michael
|
|
|
Post by compsulyx on Mar 8, 2015 13:59:45 GMT -8
Dear Michael, I would be interested to see some pictures of your light trap with 1000 watts lamp running. Don't you have problems to get the moths on the early morning as many are certainly far from the sheet ?. I'm collecting in the tropics, so I'm opened to other advices and need to be sure before to buy a new ballast and 1000 w lamps. I would appreciate if you could share your experience. Thanks in advance. For information, hereunder, some pictures of my light trap, with two lamps, as I'm on top of hill, 500m altitude, with rainforest around. This is the entry of a natural reserve. As you can see, the MV125w (with ballast)+ MV250w (self ballasted, so with the large umbrella above to prevent explosion with rain drops)are enough to get a large amount of moths (both are coated bulbs). I'm afraid if I increase the power, a lot of moths will be spread too far from the ligth trap.... Thierry.
|
|
|
Post by mikelock34 on Mar 9, 2015 2:10:20 GMT -8
People always mention the moths landing far from the sheet, but I have never experienced that with the 1000W MV setup. I bring three pieces of four feet long rebar with me that can be hammered into the ground anywhere. I place those approximately five or six feet apart in the ground. I use string or duct tape to attach short poles to the outer pieces of rebar. I tie the 1000W MV bulb to a ten or twelve feet high pole and attach that to the middle piece of rebar with the bulb pulled away from the pole to keep the bulb from touching anything. I hang a black light tube to each side of the sheet with the bottom of the bulb pulled back from the sheet to give a wider light dispersal on the sheet. I tie a piece of metal core clothes line tightly to the outer two short poles to hang the sheet from. Easy to cut poles in the forest or bring your own precut poles if possible. I have never had a 1000W MV bulb pop in the rain no matter how hard the rain was coming down.
|
|
|
Post by bugdude56 on Mar 9, 2015 12:44:40 GMT -8
What a lot of collectors do, myself included, is to run a HgVL and a 15w BL together. After several hours, recycle (unplug/replug) the HgV leaving the BL on. While the HgV recycles, the theory is that the BL will draw in those species that have landed on the edge of HgV light perimeter. I use a 175w clear HgV bulb to collect Pleocoma (Rain Beetles) and, as Mikelock34 mentioned, I have never had one explode or burn out while raining and/or snowing. RE: UV LEDs; I have converted several of these into light traps to collect coleoptera in the sw US. www.ebay.com/itm/Pure-Garden-Solar-Bug-Zapper-LED-and-UV-Light-/390875655962?pt=LH_DefaultDomain_0&hash=item5b02012f1aJust my 2¢ ...
|
|
|
|
Post by compsulyx on Mar 9, 2015 13:53:54 GMT -8
Thanks for tips guys. Any pictures of your trap to see how it looks like in the field ... Thanks Thierry
|
|
|
Post by mikelock34 on Mar 12, 2015 12:12:55 GMT -8
I do not have any photos. Other people do.
Michael
|
|
|
Post by exoticimports on May 16, 2018 3:32:48 GMT -8
|
|
leptraps
Banned
Enter your message here...
Posts: 2,397
|
Post by leptraps on May 16, 2018 6:20:12 GMT -8
I have a box full of various LED bulbs, supposedly UV, all from China. Several weeks ago I received a LED UV Flash Light. I will admit, it works, however, I set it next to an 8 Watt BLB fluorescent bulb and absolutely nothing came to the LED. It barely registered on my UV Light Meter.
And then there is the "Corn Light". Do not waste your money.
Someone will figure all this out sooner or later. The Pest Control folks, especially the "Fly Trap" folks would love to see a LED or some other type of bulb to replace the fluorescent bulbs. The best source of UV light is our sun. HID bulbs are the only bulbs to come close.
|
|
|
Post by Adam Cotton on May 16, 2018 9:03:03 GMT -8
The best source of UV light is our sun. Maybe that's why the 125W MV bulbs available here in Thailand are known locally as "Lawd Saeng Jan", or in English "Moonlight bulbs". Adam.
|
|
|
Post by Adam Cotton on May 16, 2018 12:08:01 GMT -8
I received an e-mail from a friend who breeds Saturniidae and lurks as a guest on Insectnet but is not actually a member. He asked me to post this link about the LepiLED light trap here: www.gunnarbrehm.de/en/contact.htmlas well as a link to his article: nl.pensoft.net/articles.php?id=11887My friend thought it would be interesting for everyone here. Adam.
|
|
|
Post by Chris Grinter on May 16, 2018 15:53:32 GMT -8
Gavin Svenson has been working on this for years and you can buy some of his prototypes. They do work, but aren't as good as a 15w UV bulb yet - I missed his 2017 talk at ECN, but I bet progress is being made. Here is one of his older presentations www.idigbio.org/wiki/images/8/8c/SvensonECN_2014.pdf
|
|
leptraps
Banned
Enter your message here...
Posts: 2,397
|
LED lights
May 16, 2018 16:27:20 GMT -8
via mobile
Post by leptraps on May 16, 2018 16:27:20 GMT -8
I just checked out the prices. 385€ or $405.00.
You can purchase a lot of UV power for $405.00.
|
|
|
Post by africaone on May 17, 2018 4:14:42 GMT -8
would like to see a comparative study ( a real one)…. if it seems that progresses are made, the efficiency of vapour mercury lights seems very well higher a car battery is not easy to travel and you need many of them, not really a progress to go in the bush exept that you don't need benzin.
|
|