@ junkmanme : thank you junkmanme for helping me to figure it out, can anyone explain it to perfecting junkmanme's answer?
2nd candling i've made just about half hour ago resulted in : 4 eggs have "strange" look, another 4 eggs showed nothing then "air space" and yolk. so i decided to took 4 eggs that failed out from bator and keep the 4 eggs that show "strange" inside. from 4 "strange" eggs, i saw 2 have really clear red vein, the other 2 eggs i can see better cause it's too dark inside the eggs so i decided to just let it until the 21st day. so, it's 10 days to go for those 4 eggs to show result. just a minute i've finished making 4 "square hole" and 1 "other square hole" on top for window. i decided to make the window very2 small for only letting me see some part of eggs and thermo hygro meter. this is based from my experience, when i made big window, it need 3 bulb to make it 38 deg and the heat lost very fast when the power failure come. the window just about 2x4 cm. 4 other "square hole" is made for respiration for eggs, i will close them when it's really necessary. i'm trying to put 12 volt bulb battery powered to my styrobator cause i think that styro hold heat better than just triplex. i think if the temp inside styrobator can be keep by battery powered bub then i don't need to use kerosene lamp since it's very2 flammable.
@ GreenGoddess : can you tell me site/link that show the how to make styro not very flammable? thank you, oh, by the way, i think it will make us harder to check the temp and humidity inside if make the window on side, won't it? i just make the window very2 small, i don't measure it, just cut it, maybe it only 2x4 cm, very2 small, just make me able to see some eggs and thermohygro condition.
but if the bulb can't keep temp from fluctuating to much then i need to use kerosene and it's very2 danger. the eggs are coming tomorrow so i don't have to time to test the styrobator even i haven't install the wiring, standard bulb, emergency 12 volt bulb, lamp fitting, water place and eggs place. in styro bator, i think that i can hold 80 eggs it i don't need place reserved for kerosene lamp and 12 volt emergency bulb, but since i have to then it can only hold max 50 eggs (maybe).
